Free Software Directory:IceCat extensions (proposed)

Proposed GNUzilla IceCat (the GNU version of Mozilla Firefox) add-ons. This page is to help organize our work of reviewing and properly identifying the licensing info on thousands of add-ons listed on the Mozilla Addons site. The reason this work is necessary is because of numerous errors the licensing information provided on addon pages, including proprietary programs listed on the Mozilla site.

Urgent

Please help us setting up these add-ons, see Discussion for details:

• eID add-ons
• Session Manager
• Simple Locale Switcher to make it convenient to use language packs instead of using about:config.
• uBlock (see https://github.com/chrisaljoudi/uBlock/issues/1461), and uBlock Origin.
• Anti-Porn Pro and ProCon Latte Content Filter
• Cryptocat.
• Currently Status-4-Evar is the only add-on/status bar with license notices in the files. However, the authors of The Addon Bar (Restored) (popular) and Puzzle Toolbars (optimized) have been requested to do this too as several add-ons depend on these kind of add-ons for visual performance. This will give the option to choose which add-ons they want to use for that but also help us if one of these add-ons become non-free as we can switch to the other.
• Forecastfox (fix version)

About

Currently about 600 stable and essential add-ons are listed. They have been tested with the latest icecat package in Trisquel, lagged from the release date with a few weeks in general. They will be continued to be tested in Trisquel as the IceCat maintainer, Rubén Rodríguez, also is the project leader of Trisquel.

• See this page for a list of add-ons from this page that have been primarily reviewed and are likely to be officially approved. If you see "Not available for Firefox 31.0" for an add-on in addons.mozilla.org you have to go to the add-on page and click on "Version Information" and then on "See complete version history" to find a version that match your browser version. See FSD:IceCat add-on third-party repositories for tools for the add-ons in this page.

Merged repositories to this one:

• Free add-ons from Mozilla Most Popular Extensions (add-ons with +100 k Daily Users)
• Free add-ons from Mozilla Featured Add-ons (~150 add-ons)
• Free add-ons from Mozilla tagged eID
• Trisquel web browser (~500 add-ons, merged 2015-03-18)
• Free add-ons from A List of Stable, Non-Conficting and Essential addons (picked from ~700 add-ons)

The section +1 M Daily Users have been merged to the Trisquel Web Browser repository.

Many add-ons are present in all repositories so its hard to say exactly how many add-ons that have been reviewed. Many add-ons not found in any of the above repositories have been added here. Also note that the repository on this page has superseeded the these repositories for the following reasons: Many add-ons have been added that is not found in these repositories as add-ons here have been updated, removed, replaced for following reasons: incompatibility with IceCat 31.5.0 (based on Firefox ESR 31.5.0), buggy, superseeded, bad rating, not significant popular, add-ons for proprietary software or formats (Microsoft .NET Framework Assistant, and softwares with Flash, MP3, MP4, etc in the software name), Service as a Software Substitute (SaaSS), support for other OS but GNU/Linux (general Free Software Directory requirement), secure version over non-secure version (SSL versions of OpenSearch over non-SSL versions), international version over national version (eg meteorology add-ons), and known mass surveillance services (commercial cloud/social media). The reason why you don't find these add-ons on the IceCat page is because they are not published on the Free Software Directory.

Add-ons that were listed on addons.mozilla.org without any license were manually downloaded and reviewed. I added them only if the files distributed them as free software.

Additional resources

• Language packs: Language packs are add-ons that let you to have more languages available for the user interface of IceCat. To find language packs for your version of IceCat, visit http://ftp.gnu.org/gnu/gnuzilla/, click on your version (also look in newer version of your release), then go to the langpacks directory.

Development

• http://git.savannah.gnu.org/cgit/gnuzilla.git/tree/tools/AddonsScraper.py

Disclaimer

• Please add "IceCat" but not "Firefox" in the "This an extension, add-on, or plugin to" field in new add-on entrys, as suggested by the FSF.
• Please refer to addons.mozilla.org pages if you cannot find any license in the source. Sometimes they add it just on the project page in addons.mozilla.org.
• Please verify license for unapproved add-ons before adding new ones.
• If you switch from SpyBlock to uBlock. SpyBlock subscribes to all filters in http://gnuzilla.gnu.org/filters/ (note the non-SSL connection). All of them except javascript.txt are enabled by default. uBlock can subscribe to Adblock Plus filters too, if anyone just could provide subscription links to them (not possible here in directory.fsf.org). I have asked the owner of https://adblockplus.org/en/subscriptions to add them there but note that http://gnuzilla.gnu.org/filters/javascript.txt and http://gnuzilla.gnu.org/filters/third-party.txt cannot be added because ABP doesn't support that "when in private browsing mode" feature, according to him.

+1 M Daily Users

Adblock Plus	Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Adblock Plus Pop-up Addon	Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.
DownThemAll!	The first and only download manager/accelerator built inside Firefox!
Firebug	Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page... Review notes: Firecookie is part of Firebug since Firebug 1.10
FlashGot Mass Downloader	Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.
Greasemonkey	Customize the way a web page displays or behaves, by using small bits of JavaScript. Review notes: User Scripts are licensed separately by their authors so you should check them separately in order to verify if they are free software.
Web of Trust - WOT	Find out which websites you can trust. WOT adds intuitive traffic light-style icons next to search results and URLs to help you make informed decisions about whether to visit a site or not.

100-999 k Daily Users

All-in-One Gestures	This extension allows you to execute common commands using mouse gestures, rocker navigation, scroll wheel navigation and page... Review notes: FireGestures better
All-In-One Sidebar	AiOS lets you open various windows as sidebar panels, and quickly switch between them. So it put an end to the window chaos! In addition to bookmarks and history it opens dialogues such as downloads, add-ons and more in the sidebar.
Ant Video Downloader	It has never been simplier to download videos from Youtube, Dailymotion and from most of the video streaming site. Just play the video, click on the toolbar, download and play it immediately in our integrated video player.
Awesome Screenshot Plus	Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!
BlockSite	BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality. Review notes: Useful if uBlock does not block popups instead of doing it with Adblock Plus as it consumes more CPU.
Bluhell Firewall	Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
ChatZilla	A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.
Classic Compact	A very compact & highly customizable theme that minimizes space consumed by menu & tool bars without hurting the overall usability. Supports Windows, Mac & Linux.
Classic Compact Options	This add-on allows one to customize the theme "Classic Compact". Options include: 10 different toolbar button sets; turning off gradient backgrounds; OS scrollbars; dark system color support; merging menu bar into one menu button; etc.
Classic Theme Restorer (Customize UI)	Squared tabs, appmenu, add-on bar, small button view and many more 'old' features for Firefox 29+ (Windows / MacOSX / Linux).
Clear Cache Button	Adds a clear cache toolbar button. After installing the extension, find the clear cache button in the toolbar customization...
Click&Clean	The quick and easy way to delete your browsing history, erase all temporary internet files, remove downloaded files history, cookies, Flash LSO, typed URLs. Allows to delete private data when Firefox closes. Supported ext. tools like CCleaner. Review notes: This is the only free add-on that we know can delete Flash LSO's, commonly called Flash cookies. LSO's are downloaded by Flash players so if you don't use say Gnash (a free Flash player) you don't need this add-on. I recommend this add-on for a separate browser profile that runs plugins.
Copy Urls Expert	Provides options to 'Copy Urls of All Opened Tabs in Current Window', 'Copy Urls of Tabs in All Windows', 'Copy Urls of All Links in Selected Text' and 'Copy Urls of All Images in Selection'. Allows to open multiple tabs.
Disconnect	Make the web faster, more private, and more secure.
DOM Inspector	DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Download Flash and Video	Download Flash and Video is a great download helper tool that lets you download Flash games and Flash videos (YouTube, Facebook, Dailymotion, Google Videos and more) with a single click. The downloader is very easy to use.
Download Manager (S3)	This is a new life in Firefox 26+ for old well-known addon Download Statusbar
Download Status Bar	If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.
Easy Access	Allow an easy access to the system commands and other programs in your computer.
Easy Screenshot	Easy Screenshot is an easy to use screen capture tool. Simply press one of the context menu items to capture entire or a portion of your screen.
Easy Youtube Video Downloader Express	Only one with 1080p Full-HD and 192kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV,3GP,MP3,MP4,720p, 1080p qualities on Youtube pages.
Element Hiding Helper for Adblock Plus	Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier. Review notes: Not compatible with SpyBlock. This add-on requires the following add-ons to work properly: Adblock Plus, Adblock, Adblock Edge, or SpyBlock
Fast Dial	Visual bookmarks for Firefox. (Works with all latest versions of Firefox)
FEBE	FEBE (Firefox Environment Backup Extension) allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.
FireFTP	FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.
FireGestures	A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
Flash Video Downloader	Flash Video Downloader helps you to download any video (flv, mp4, HD) from YouTube-like, Facebook, Break, Metacafe and more in one click. You can download mp3, music (iPod), avi and more. Download Flash games. Download Helper. 4K download
Flashblock	Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...
FoxyProxy Standard	FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.
FXChrome
gTranslate	With gTranslate you can translate any text in a webpage just by selecting and right-clicking over it. The extension uses the Google translation services to translate the text. Review notes: Service Unavailable
HttpFox	An HTTP analyzer addon for Firefox
Image Zoom	Adds zoom and rotation functionality for images...
ImgLikeOpera	ImgLikeOpera allows load only the images that you want in Firefox browser. This extension is very useful for non broadband users... Review notes: Slow connection
ImTranslator - Google Translator, Dictionary, TTS	ImTranslator provides translation powered by Google Translate, Microsoft, Babylon for 70+ languages. It includes Translator, Dictionary, Text-to-Speech, Back Translation.
JavaScript Debugger	As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed. Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.
Lightbeam	Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
Live HTTP Headers	View HTTP headers of a page and while browsing.
MEGA extension	Install the MEGA Firefox extension for vastly improved download performance. It will allow you to batch-download an unlimited number of files without any size restrictions from MEGA.
Memory Fox	Attempting to reduce both Browser and Flash RAM Memory usage. Memory Fox will promote the increase of available RAM memories for other application processes. Hopefully, fostering any attempts of Memory Recovery and Retention.
MinimizeToTray revived	Minimizes windows into the system tray.
Modify Headers	Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.
Mozilla Archive Format, with MHT and Faithful Save	Open web pages saved with Internet Explorer or other browsers (MHT). Save many tabs, video and audio reliably, in a single ZIP file (MAFF). Return to the original site you saved a page from, and more!
Mozilla Firefox hotfix	This official add-on enables Firefox to provide quick fixes for selected issues.
New Tab Homepage	A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.
Noia Fox	me for Firefox and Thunderbird. Based on Noia Iconpack by Carlitus (deviantART). Noia Fox options is here (small icons, square tabs,...).
NoScript Security Suite	Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks. Review notes: Useful to use Flash, Java, and video plugins securely. NoScript implements two features not found in uBlock: Application Boundaries Enforcer (ABE) and ClearClick (anti-clickjacking) to protect web browser plugins from being exploited. However, in most cases plugins are unnecessary in web browsers, and security experts recommend that it not be run in a browser unless absolutely necessary. If plugins are required by a few web sites, users should have a separate browser profile specifically for those sites. Note that frame-based clickjacking is still possible even if you don't use plugins, NoScript can prevent this but also give false positive notifications. µBlock or Adblock Plus based add-ons provides great power & flexibility in controlling cross-site requests, but requires writing rules. NoScript that blocks all scripts (or RequestPolicy for cross-site requests) provides an interface that is quick & easy to use, and perhaps most importantly, gives feedback about which requests are being blocked/allowed on each page, but without the fine-grained permissions that the other mentioned add-ons allows.
NoSquint	NoSquint allows you to adjust the text-only and full-page (both text and images) zoom levels as well as color settings both globally (for all sites) and per site.
Password Exporter	This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.
PDF Viewer	PDF.js brings Portable Document Format (PDF) reading capabilities to your browser using web standard technologies. Review notes: Part of Firefox
Personal Menu (Personal Firefox Button)	Bring back your personal and powerful Firefox Button!
Personas Plus	Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.
Print Edit	Allows editing of web page content while in Print Preview mode, prior to printing or saving as HTML or PDF. Compacts the layout and removes unwanted content such as adverts, sidebars and blank pages. Any element can be formatted, hidden or deleted.
Print pages to Pdf	Creates one Pdf from any amount of open Browsertabs,Bookmarks/-folder, Scrapbook(Plus) pages. This document can be archived, sended by e-mail or printed out with any standard Pdf Viewer. Review notes: Broken
ProxMate	Removes country restrictions for FREE! Just like that.
Public Fox	Block downloads, lock down bookmarks/addons/downloads with a password.
Quick Translator	The most lightweight and easiest translator. Translate between more than 80 languages with one click or a hot key. Translate from one word to a whole page.
QuickJava	Allows quick enable and disable of Java, Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Toolbar. This is great for increasing security or decreasing bandwidth.
Reddit Enhancement Suite	A suite of tools to enhance Reddit
ReloadEvery	Reloads web pages every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (right click on the tab)
ReminderFox	ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program. Review notes: Popups are seen outside the Firefox window which is great as you get reminded no matter in which software you work.
RequestPolicy	***RequestPolicy's new version is under development as RequestPolicy Continued.*** Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks. Review notes: RequestPolicy (prior 1.0) only have Whitelist policies and have not been maintained since 2013. RequestPolicy Continued (starting with 1.0) can both block and allow but this add-on is in beta. Meanwhile you might want to use uBlock: “Dynamic filtering is available to advanced users. As of version 0.8.7.0, dynamic filtering in uBlock can act as a complete replacement of RequestPolicy, or similar add-ons.” - https://github.com/chrisaljoudi/uBlock/wiki/Dynamic-filtering
RESTClient	Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.
S3.Google Translator	S3.Google Translator adds the power of Google Translate’s automatic translations to your browser! Review notes: Quick Translator is really quicker to use.
ScrapBook	Helps you to save Web pages and organize the collection.
Self-Destructing Cookies	Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.
Session Manager	Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually. Review notes: This behaviour emulates GNU IceCat's: Preferences -> Startup & Shutdown: Select session <Previous Browsing Session>. Useful for browsers like Abrowser.
Speed Dial	Direct access to your most visited websites
Speed Dial (FVD)	FVD Speed Dial - Speed dial button, Online Synchronization, New Tab Start Page, Organize bookmarks, Custom backgrounds, custom dials, organized groups, most visited dials.
SQLite Manager	Manage any SQLite database on your computer.
Status-4-Evar	Status bar widgets and progress indicators for Firefox 4+ Review notes: Only Add-on Bar correctly licensed
Strict Pop-up Blocker	Quickly toggle between blocking all pop-up windows and allowing some pop-ups
Stylish	Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.
Super Start	Just another speed dial extension. Fast and easy to use.
Tab Mix Plus	Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
Tab Scope	Preview and navigate tab contents through popup.
Tamper Data	Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...
Test Pilot	Help us make Firefox better by joining our structured user studies! No need to download this add-on if you are running Firefox 4 beta, - you are already a part of the team!
Text Link	Allows URI texts written in webpages to be loaded by double clicks.
The Addon Bar (Restored)	Gives you a place to put all your add-on buttons without over-crowding the navigation bar.
Thumbnail Zoom Plus	Shows full image when you hover over a thumbnail. Works with Amazon, Baidu Images, Bing Images, Facebook, Flickr, Google+, Google Images, IMDb, LinkedIn, Netflix, Pinterest, Reddit, Twitter, Yandex, YouTube, Wikipedia, Yahoo Images, & many more.
TinEye Reverse Image Search	TinEye is a reverse image search engine. The plugin adds a context menu item that allows you to search for an image to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.
Toolbar Buttons	Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Tree Style Tab	Show tabs like a tree.
Updated Ad Blocker for Firefox 11+	It blocks ads on the web pages you visit including Youtube, Hulu, TwitchTV/JustinTV, most Major News Sites(cnn/fox/nbc/msnbc) and many more. Ads from services like Google AdSense Yahoo DoubleClick It also blocks the GoogleAnalytics tracking script.
User Agent Switcher	The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
Web Developer	The Web Developer extension adds various web developer tools to the browser.
wmlbrowser	Simulate WAP browsing by viewing WML (Wireless Markup Language) pages.
xThunder	Manage popular downloaders (Windows, Linux, Mac) and support special links of thunder,flashget,qqdl,ed2k,magnet,fs2you.
YouTube ALL HTML5	Play all videos on youtube without flash in your preferred size using only HTML5. Review notes: HTML5 Video Everywhere! prefered.
Youtube Downloader 4K	Download from YouTube 4K videos and thousands other video websites.
YouTube Flash Video Player	YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.
YouTube High Definition	YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.
YouTube Unblocker	Watch blocked YouTube videos – YouTube proxy-server, only if needed!
YouTube Video and Audio Downloader	Downloads YouTube videos in all available formats (FLV, MP4, WebM, and 3GP) with video quality of your choice. It also contains a pure JavaScript library to extract the ORIGINAL audio file embedded in video files.
YSlow	YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
µBlock	Finally, an efficient blocker. Easy on CPU and memory. Review notes: “Dynamic filtering is available to advanced users. As of version 0.8.7.0, dynamic filtering in uBlock can act as a complete replacement of RequestPolicy, or similar add-ons.” - https://github.com/chrisaljoudi/uBlock/wiki/Dynamic-filtering

10-99 k Daily Users

about:addons-memory
Add Bookmark Here ²	Add a menuitem "Add Bookmark Here..." to Bookmarks...
Add to Search Bar	Make any pages' search functionality available in the Search Bar (or "search box")...
Add-on Compatibility Reporter	Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
Add-ons Manager Context Menu	Add more items to Add-ons Manager context menu.
Addictive Typing Lessons
Advanced Cookie Manager	A must have tool for Web Developers and Testers to Manage and monitor web cookies. Features List: Add, Delete, Modify, Export / Backup, Import / Restore, Monitor cookies
Anti-Porn Pro	Cloudacl WebFilter is cloud based porn content filtering application monitoring millions web sites and billion of web pages to keep you family especially your kids away from sex, nudity and adult content.
Auto-Sort Bookmarks	Sort bookmarks by multiple criteria
AutoAuth
AutoCopy 2	Copies selected text to the clipboard automatically.
AutoPager	AutoPager automatically loads next pages when you reach the end of a page. It works on a ton of sites,Google,Yahoo.. It works well with most other add-ons adblock plus, WOT and most of the greasemonkey scripts. You can also try AutoPagerLite.
AutoProxy
Bamboo Feed Reader	Feed reader
BBSFox	telnet client extension specifically designed for BBS browsing. It support mouse browsing and FireGestures script.
BlackFox V2	BlackFox - A dark & hot theme for Firefox. Fully skinned and animated.
BlackFox V2-Blue	BlackFox - Blue version. A dark and hot theme for Firefox. Fully skinned and animated.
Blank Your Monitor + Easy Reading	BYM: Changes color combination ; left-click in the statusbar for changing its status (ON/OFF) or press Ctrl-Alt-B. ER: Makes text reading easy; select the text, right-click, select the "Easy Read" entry in the context menu or press Ctrl-Alt-Z
Bloody Vikings!	Simplifies the use of temporary e-mail addresses in order to protect your real address from spam. Supports inter alia 10minutemail.com and anonbox.net.
Bookmark Deduplicator
Bookmarks Checker	Check favorites for broken or bad links. It checks for bad links and displays a report if it finds something. Check for 404 links, timeout links.
Brief	Brief makes reading RSS feeds as easy and intuitive as it gets. Designed to have exactly the right set of features, it is powerful and simple at the same time. Feeds are presented on a seamless, interactive page which let's you bookmark and tag items with a single click.
BugMeNot	Bypass compulsory web registration with the context menu via www.bugmenot.com.
Cache Status	Easy cache status & management from status...
Capture & Print	This add-on lets you print a webpage's area easily.
Certificate Patrol	Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.
Check4Change	Check4Change (aka C4C) is a simple extension that allows you to periodically check a web-page for updates...
Classic Toolbar Buttons	'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.
Clean Links	Converts obfuscated or nested links to genuine clean links.
Cleanest Addon Manager	Review notes: This style are included in: Littlefox for Firefox
Clear Console
Console²	Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.
CookieKeeper	Extended Cookie Manager - Keep only wanted cookies. Review notes: Self-destructing cookies prefered
Copy As Plain Text
Copy Plain Text 2	Copies text without formatting
Cryptocat	Cryptocat lets you instantly set up encrypted conversations. It's an open source, private, safer chatting alternative. Cryptocat uses the OTR encrypted messaging protocol to offer accessible communications to everyone.
Custom Buttons	Gives a possibility to create custom toolbarbuttons...
Custom Tab Width	Lets you customize the minimum and maximum tab width.
Customizable Shortcuts	Allows to customize or disable most of the shortcuts offered by Firefox. This add-on does *not* allow to add new shortcuts.
Dafizilla Table2Clipboard	Review notes: Especially useful in the context menu is “Table2Clipboard - Select column” as you can select muliple and specific columns.
Default FullZoom Level	Set Default FullZoom Level, Toolbar buttons for Page zoom and Text zoom. Review notes: Disability
Disable Add-on Compatibility Checks	Reinstates the extensions.checkCompatibility preference without respect to the current application version. Review notes: Use at own risk. Useful for developers.
Disable Anti-Adblock	Disables anti-adblocker scripts
Disconnect Search	Review notes: Default search engine in Tor Browser Bundle
Drag & DropZones
Drupal For Firebug	Drupal for Firebug extends the Firebug module to provide Drupal debugging and status messages.
Easy Copy
Empty Cache Button
Extended Statusbar	A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)
external IP	This extension display your current external IP address in the browsers statusbar. Review notes: Also seen with the WorldIP add-on
Fasterfox Lite	Fasterfox Lite: Performance and network tweaks for Firefox, without the Enhanced Prefetching. This is a fork from the original "Fasterfox".
FavIcon Reloader	FavIconReloader reloads Favourite Icons by retrieving information from all bookmarked web sites.
FindBar Tweak	Anything between simple tweaks such as placing the findbar in the top corner, to the powerful "Find in All Tabs" tool, FindBar Tweak will make your find toolbar "just right"!
Firebug Autocompleter	Firebug command line autocomplete.
Firediff	Track Changes in Firebug
FirePHP	FirePHP enables you to log to your Firebug Console using a simple PHP method call. Not using Firebug 1.9+ on Firefox 8+? See http://firephp.org/
Firepicker	Simple color picker plugin for Firebug.
FireQuery	Firebug plugin for jQuery development
FireSSH	FireSSH is a free, cross-platform SSH terminal client for Mozilla Firefox. Written entirely in Javascript!
FlashFirebug	Debug Flash/SWF files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer. View AMF calls and Shared Objects and much much more...
Font Finder	FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
Forecastfox (fix version)	Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Form History Control	Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller. Auto-save text entered in any form while typing to allow fast recovery when disaster strikes. Control for which webpage form history is saved or not.
FoxClocks	FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
FoxReplace	Lets you replace text in web pages. You can define a substitution list and apply it automatically or at your own discretion, or make individual substitutions. You can use this as a filter, or just for fun :)
Free Memory	An add-on to perform free-memory operations without visiting about:memory.
GNotifier	Add-on for Firefox and Thunderbird. Integrates Firefox's notifications with the OS's native notification system. It supports most Linux desktops and Windows 8.
Google Translator Lite	Google™ Translator is a handy multi-language translator built on top of Google Translate. It gives you Google Translate UI feel right on your Firefox toolbar.
HackBar	Simple security audit / Penetration test tool.
Hide Caption Titlebar Plus	"Maximize your screen space by controlling the presence of Firefox window Title-bar (Caption) & borders!", to be like Chrome Browser. - Hide FF's caption with 'smart' options, *optional* custom caption & resizers. - Works with ChromiFox-like themes. Review notes: This is the only working caption hiding add-on. Make sure to maximize the window after you have installed this add-on to make it useful (https://code.google.com/p/firefox-hide-caption-titlebar-plus/issues/detail?id=278).
Hide Tab Bar With One Tab	Hide the tab bar if there is only one tab.
HTML Desktop Notifications
Html Validator	HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon
HTML5 Video Everywhere!	Replace video player with Firefox native video player. Review notes: 31.4.0 IceCat users: Primary choice: Upgrade to IceCat 31.5.0. Second choice: Install this add-on to upgrade from HTML5 Video Everywhere! 0.1.1.
Image Block	Image Block adds a toggle button that conditionally blocks/allows loading of images on webpages. Blocking images results in faster browsing, especially helpful on handheld devices or slower connections like GSM/GPRS/EDGE dial-up etc.
Image Search Options	Image Search Options provides a set of highly customizable reverse image search context menu options.
InFormEnter	InFormEnter adds a small, clickable icon next to every input field in a web form, from where you can select the item to be inserted - no typing required.
Inline Code Finder for Firebug	Inline Code Finder is an add-on to Firebug, to be able to find HTML elements with any of the below issues: Inline JavaScript events, inline style, javascript: links
InlineDisposition	Review notes: “At last, no need to confirm "open with..."!”
InstantFox Quick Search
ipFlood	Simulate the use of a series of proxy changing at each new connection.
It's All Text!	Edit textareas using an external editor, because it's all text!
JavaScript Deobfuscator	This add-on shows you what JavaScript code runs on a web page, even if it is obfuscated and generated on the fly. Simply open JavaScript Deobfuscator from the Web Developer menu and watch the scripts being compiled/executed.
JSONView	View JSON documents in the browser.
Just Disable Stuff	Just disable JavaScript - toggle it on and off. No fancy toolbars, icons, windows, unnecessary functions. Just do it. You can also disable images. And CSS. And multimedia.
Keyword Search	Search in the awesome bar without changing your search engine.
LanguageToolFx
LavaFox V2	LavaFox - A dark and hot theme for Firefox. Fully skinned and animated.
LavaFox V2-Blue	LavaFox - Blue version.A dark and hot theme for Firefox. Fully skinned and animated.
LavaFox V2-Green	LavaFox - Green version.A dark and hot theme for Firefox. Fully skinned and animated.
LavaFox V2-Purple	LavaFox - Purple version.A dark and hot theme for Firefox. Fully skinned and animated.
LeechBlock	LeechBlock is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
Lightweight Themes Manager	Manage your installed personas (lightweight themes).
Link Alert
Link Gopher
Linky
Littlefox for Firefox	LittleFox, designed for optimal screen usage, leaving lots of room for browsing. Includes support for many extensions.
Locale Switcher	Displays a menu item for switching the application locale.
Location Bar Enhancer	Changes the Location Bar of Firefox into a Breadcrumb display with rich and interactive features.
Lucifox	Read EPUB e-books and browse OPDS catalogs.
Master Password+	Various enhancements for build-in "master password" (MP).
MediaPlayerConnectivity	Allow you to launch embed video of website in an external application with a simple click.
Memory Restart	Review notes: “There is also an auto restart feature”
Menu Wizard	Customize menus : Helps removing, moving and renaming menus and menu items. Colorize important menu for ease of use! (use Style (CSS)). Change or disable any of used keyboard shortcuts. Support: Firefox, Thunderbird and SeaMonkey
Morning Coffee	Keeps track of daily routine websites and opens them in tabs...
Multifox	An extension that allows Firefox to connect to websites using different user names. Simultaneously.
Multiple Tab Handler
Muter
New Tab Tools
NewsFox	NewsFox is an efficient 3-pane(email) style Atom/RSS feed reader.
NewTabURL	Select the default URL when new tabs are opened. The options are: "A blank page", "The home page", "The current page" or a user defined URL. When there is an URL in the clipboard, it is also possible to open automatically that URL in the new tab.
No Flash	Replace Youtube and Vimeo Flash video players embedded on third-party website by the HTML5 counterpart when the content author still use the old style embed (Flash). HTML5 Video Everywhere! Notes: "Some legacy sites force using Flash player, you will need to install no-flash add-on to support them."
NoiaScrollbars	The "NewScrollbars"-extension replaces the default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes".
Notepad (QuickFox)
Omnibar	Integrates location bar and search bar into one. Shows search and url suggestions. Quickly switch search engine using search keywords. Provides different auto-complete popup styles for compact displays.
OmniSidebar
Online Convert
OpenDownload²	OpenDownload² extends the "Save" dialog by a "Run" button to open the file directly.
Places Maintenance
Prevent Tab Overflow	Make sure your tabs stay visible all the time.
Privacy Badger	Protects your privacy by blocking spying ads and invisible trackers. Warning: This add-on is in alpha, so you may find some bugs! Read more: https://www.eff.org/privacybadger Review notes: “This add-on is in alpha, so you may find some bugs!”
Private Tab	Adds private tabs.
ProCon Latte Content Filter
ProfileSwitcher
Puzzle	Adds a 'Puzzle' item to the main context menu. You can turn any image to puzzle pieces and play.
QrCodeR	Encode selection, links and images to QrCode with right-click.
QuickNote	A simple note-taking extension.
Rainbow Color Tools	Color tools for web development. Color picker and eyedropper + saving colors and trying out colors with drag and drop.
Random Agent Spoofer	Rotates complete browser profiles (from real browsers / devices) at a user defined time interval. It includes many extra privacy enhancing options
Reader	Reader is the ultimate Reader tool for Firefox.
Red Cats (blue flavor)	There can never be too many cats! Turn your Firefox into Firecat and enjoy browsing in the furry company. The theme also comes in green flavor. Beta version for Firefox 32.x -38.x is currently available at the support forum and the home page.
RefControl	Control what gets sent as the HTTP Referer on a per-site basis.
Reload Plus	Reinstates the extensions.checkCompatibility preference without respect to the current application version.
RememberPass
Restartless Restart	This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
Resurrect Pages	Dead pages, broken links, the scourge of the internet. Powerhouse sites like Slashdot and Digg can bring a server to its knees. What do we do when a page is dead but we still want to see it? Call in the clerics, and perform a resurrection...
RSS Ticker	RSS Ticker loads your Live Bookmarks and scrolls their entries across your screen while you surf.
Sage
Save File to
Save Image in Folder	Easily save images in personally customized...
Save Images
Save Text To File
Saved Password Editor	Adds the ability to create and edit entries in the password manager.
Scriptish	The greatest user script engine on the Internet (a fork of Greasemonkey). Review notes: User Scripts are licensed separately by their authors so you should check them separately in order to verify if they are free software.
SearchLoad Options
SearchStatus	Display the Google PageRank, Alexa rank, Compete ranking and SEOmoz Linkscape mozRank anywhere in your browser, along with fast keyword density analyser, keyword/nofollow highlighting, backward/related links, canonical links, WHOIS, robots and more.
SearchWP
Secure Login	Secure Login is an extension for Firefox integrated password manager.
Selenium IDE Button	Just one simple toolbar button to open Selenium IDE. You need to have installed Selenium IDE: http://seleniumhq.org/projects/ide/
ShareMeNot	Designed to prevent third-party buttons (such as the Facebook “Like” button or the Twitter “tweet” button) embedded by sites across the Internet from tracking you until you actually interact with them.
Show My Password	You are annoyed because your password fields are always scrambled though nobody else but you can see the screen? This most advanced unscrambling addon shows your passwords in readable letters, while being fully customizable to fit your needs.
Showcase	Easily find and manage your browser tabs.
Silent Block	Minimum and fast URL blocker by regular expression.
SimilarWeb - Website Traffic Sources and Ranking	Get in-depth traffic and engagement stats for any website with a single click. See how popular a website is, its traffic sources, average time on site, ranking info, top referring sites, paid keywords, related mobile apps, and much, much more.
Simple Locale Switcher	An easier management of the user interface language
Simple Timer	A timer/clock residing in the toolbar.
Slim Add-ons Manager
SmoothWheel	Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled). Review notes: The latest official SmoothWheel version do not work in HTML TEXTAREA (so it cannot be used to edit MediaWiki's like this one or Wikipedia). Use the WIP version https://bugzilla.mozilla.org/attachment.cgi?id=8578376 (file published in https://bugzilla.mozilla.org/show_bug.cgi?id=1054737) as a work around. This issue have been reported to the developer.
SQL Inject Me	SQL Injection vulnerabilites can cause a lot of damage to a web application. A malicious user can possibly view records, delete records, drop tables or gain access to your server. SQL Inject-Me is Firefox Extension used to test for SQL Injection vuln...
Stealthy	Unlike other extensions we do the work of look for fast proxies for you. Review notes: Bad user ratings.
Tab Auto Reload	"Maximize your screen space by controlling the presence of Firefox window Title-bar (Caption) & borders!", to be like Chrome Browser. - Hide FF's caption with 'smart' options, *optional* custom caption & resizers. - Works with ChromiFox-like themes.
Tab Utilities
Text to Voice	http://en.wikipedia.org/wiki/Text-to-voice. TTS gives Firefox the power of speech. Select text, click the button on the bottom right of Firefox window and this add-on speaks the selected text for you. Isn't it brilliant? Audio is downloadable.
Textarea Cache
The Fox, Only Better	Australis, the new Firefox theme, made a great browser look awesome. And now it will also feel awesome using it! Review notes: “Slim Chrome” feature hides the navigation bar when its not activated.
Theme Font & Size Changer	Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Themes Menu
TiddlyFox extension for Firefox
Tile Tabs	Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.
TinyURL Generator	An extension to silently generate a TinyURL for your current page at the click of a button. Also shows you where TinyURLs on the web will take you.
Toggle animated GIFs	Start/stop GIF animations through a keyboard shortcut or by clicking them. You can also restart animations from the beginning, or disable animations by default.
TooManyTabs - Saves Your Memory
Tor Flashproxy Badge	Simple extension that makes Firefox a bridge for censored users in countries with oppressive regimes.
Torrent Status Tool	Torrent status in my browser and single-click torrent submission. Supports uTorrent, BitTorrent, qBittorrent, Deluge, KTorrent, Transmission, and Vuze/Azureus.
Torrent Tornado	A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!
Turn Off the Lights	The entire page will be fading to dark, so you can watch the video as if you were in the cinema. Review notes: Especially useful for video sites with unblocked ads that can be hidden with “Turn Off the Lights Settings - Basics - Automatically dim the background when you click the play button and vice versa”
UAControl	Control what gets sent as the User-Agent on a per-site basis.
Undo Closed Tabs Button	This extension allows you to undo closed tabs via a toolbar button or the right-click context menu.
UnMHT	UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
Update Scanner	Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
URL Fixer	URL Fixer fixes common typos in URLs entered in the address bar. It will fix errors like "google.con" or "youtube,com". You have the option of being asked to confirm corrections before they are applied.
URL Link	URL Link is a small Firefox and Thunderbird extension that allows you to select a non-URL in a mail/news message or web-page, and open it in a browser window.
Vertical Toolbar
Vimperator	Make Firefox look and behave like Vim
Walnut for Firefox
Walnut2 for Firefox	Walnut2, based on icons from art.gnome.org. Includes support for help, inspector, downloadstatusbar, downloadmgr, calendar, quicknote, offline, toolbarext. and many other extensions. Install "About Home Themer" to also theme the about:home page.
Wappalyzer	Wappalyzer is a browser extension that identifies software on websites. REF!
WorldIP	Professional Geo Add-on with security features and advanced network tools. Anti-phishing. Protection against DNS spoofing and fake sites. All DNS records for domain. The real location of web server, country flag, extended information about datacenter.
XPath Checker	An interactive editor for XPath expressions.
YesScript	A JavaScript blacklist
Zoom Page
Zotero autoexporting	Exports library of Zotero automatically to specific format like bib, RDF etc.
ZotFile	Zotero plugin to manage your attachments: automatically rename, move, and attach files to Zotero items, sync PDFs from your Zotero library to your (mobile) PDF reader (e.g. an iPad, Android tablet, etc.) and extract annotations from PDF files.

0-10 k Daily Users

Addons Manager Hilite
Addons Quick Search	Type first letters of add-on name to find them in the list or press Ctrl+↑/↓ to switch between add-ons categories. Additionally remember and restore last selected item in each list.
Addons Recent Updates	Show more addons recent updates
AddressBarCleaner	It cleans your address bar
Advanced URL Builder
Aeon	A cool theme with pleasant colors.
Aeon Big	Aeon Big is a big, bright theme for when you need large icons on your browser.
Aeon Clouds	A cool theme with sky and clouds for background.
Aeon Colors	Aeon Colors is a fun, colorful theme that is bright and cheery.
Aeon Jumbo	Aeon Jumbo is a theme designed for when you need very large icons. Very helpful with 24-inch iMacs.
Aeon Small	A cool theme with pleasant colors. This theme uses the smaller of the toolbar iconsets from Aeon 6 and earlier. NOTE: To get a dropdown history from a forward or back arrow, right click on it.
All Tabs Helper
Auto Context
Automatic Save Folder
Automatic window resizer	This Extension can automatically (or when manually called) fit the size of the firefox-window to the size needed to best display the current website or an object (flash, video, ...) on the page.
Back to Top
BackupFox
Best Reader Lite
Bitcoin Price Ticker
Blend In
Bookmark All
Bookmark Current Tab Set
Bookmark Tab	Bookmarks Tab is a very simpe and lightweight extension which displays a list of your bookmarks in the middle of newly opened tabs.
Bookmarks Sidebar Scroll Retainer
Bookstack	This extension lets you rapidly fill up a bookmark folder and go through its contents one site at a time. Emphasis is on adding and removing with ease.
Booky
Boss Key and Buttons
Bricks for Firefox	Bricks for Firefox, theme optimized for using your own background. Based on the Nautipolis/LittleFox framework.
Browser View Plus (PlayLink)
Browsizer
CanvasBlocker	Blocks the JS-API for modifying <canvas> to prevent Canvas-Fingerprinting.</canvas>
CheckFox
ChmFox
Clear Site Cache	Quick one click solution to clear the cached contents of the site you are currently browsing. Review notes: This add-on should be part of Firefox: 1) By default you can clear site specific cookies from the context menu under View Page Info. 2) Under Preferences - Advanced - Network - the Clear Now button under Cached Web Content will wipe the entire cache, there is no way to clear the cache for a given site.
CLEO	CLEO (Compact Library Extension Organizer) is a Firefox extension that works with FEBE* to package any number of extensions/themes into a single, installable .xpi file.
Clickless Menu
cliget	Download files using curl or wget. This addon generates curl/wget commands that emulate the request as though it's coming from your browser allowing you to download protected files directly to a separate machine (e.g. server).
Close other tabs
Close Repeated Tabs
Color Transform
Column Reader	Web reader for wide screens and long documents. Read with pleasure in one of many attractive layouts. NEW: Integrated image viewer with pan and zoom + Choice of replacement font. For Firefox 24.0 and newer.
Config Descriptions	Shows source comments for advanced application preferences in about:config Review notes: Better documentation
Context Bookmarks	Adds bookmarks to context menu so you can access them by mouse right click.
Copy All Links
Copy Extensions to Clipboard
CopyAllURLs
Cycle Input Focus	Ever found yourself reaching for your mouse seconds after going to a webpage, just to select an input form that should have been made active by the website? Cycle Input Focus removes this strain inducing movement by keeping your hands where you want them at such a time - at the keyboard.
DblClicker	Double-click action for Firefox - double-click Link, Bookmark/History to open in new tab (emulate ctrl+click).
Deletebutton
deskCut
Destroy the Web	Turn any webpage into a shoot-em up video game. With a pulse pounding soundtrack and high scores for every web page, Destroy the Web is a fun way to take a little break during the day.
diaspora* Advanced Sharer	A button to share on diaspora* via diaspora* Advanced Sharer ( http://sharetodiaspora.github.com/about/ ).
diaspora* Easyshare	Easily share web content on your Diaspora* pod.
Disable clipboard manipulations
Disable DHE	Disables ephemeral Diffie-Hellman cipher suites that are vulnerable to the logjam attack.
Disable HTML5 Fullscreen Alert	Disables "website is now fullscreen" alert
Disable Plugin & Mimetype Enumeration	Prevent sites from grabbing a list of your plugins & mime types.
Disable Visited Links	This plugin cleanly disables visited link styles.
Disable WebRTC	WebRTC exposes your internal network IP(s), without user interaction.
Document Font Toggle
Download Scheduler
Downloads Context Menu
drag to scroll (reloaded)	*enables scrolling of the viewport while dragging objects within it.
Drag-n-Drop Multiple Files
Draggable Star
Ecology	New version optimized for the new Australis interface. An all green theme "Ecology". It is composed of large icons for easy navigation.
Edit Bookmark Plus
Element Properties	Returns the 'Properties' menu item that was removed in Firefox 3.6 to the context menu.
Enable Click to Play
Encrypted Communication
Enforce Encryption	Extends Page Info dialog to allow managing Strict Transport Security - a built-in Firefox feature that determines whether encrypted connection is enforced for a website.
ErrorZilla Plus
Expire history by days
ExportHTMLFolder
Extension Auto-Installer	Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.
Extension Options Menu	Adds extension options dialogs to the Tools or Titlebar menu and includes toolbar icon.
EZ Drag-n-Drop
FF Rocker	Adds Rocker Gestures to Firefox for quicker navigation. Rocker Gestures work by holding down one mouse button while clicking the other. (i.e. holding right then clicking left will go back, left then right goes forward)
Fierr	Replaces the error page with a more stylish appearance with additional features.
File and Folder Shortcuts
Find In Numbers
Fire Commander
Fireclam	Use ClamAV to scan Firefox downloads for viruses.
FireFontFamily	Highlight the rendered font-family in Firebug
Firemacs	Emacs editing/viewing keybind
FireRainbow	Javascript syntax highlighting for Firebug
Flem
Focus Follows Mouse
For Human Eyes Only
Force Content-Type
FoxBleed	Checks the websites you are visiting whether they are affected by the Heartbleed vulnerability.
FoxVox	Review notes: “FoxVox can also create audiobooks in mp3, ogg, and wav formats.”
Free Proxy List	Is a easy way to use proxies in firefox from Proxy List site. You will have just to click a button to setup the proxy in your browser. ProxyList.ro tool for changing proxies.
FromWhereToWhere
FxKeyboard	A virtual keyboard for Firefox. Adds a keyboard to the bottom of the window. Usefull for touchscreens or kiosks setups.
Gish It!	Create a GishPuppy Disposable Email Address via right-click or Tools...
GNU LibreJS	GNU LibreJS aims to address the JavaScript problem described in Richard Stallman's article The JavaScript Trap. It is a free add-on for Mozilla browsers. It blocks nonfree nontrivial JavaScript while allowing JavaScript that is free and/or trivial.
Go-Mobile
GotoImageUrl
Group/Sort Tabs
HackSearch
Hide BookmarksBar
Hide Find Bar	Hide the Find Bar after a certain interval of inactivity has elapsed.
Hide Menubar	Review notes: I find this add-on useful as it is easy to miss the menu items by missing to click on the menu items by hovering above them if you have them at the absolue top of the window, like when No Caption is installed. Otherwise I critisize this add-on 1) The Menu Bar is hidden by default. 2) “Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.” - this is already standard in the browser.
Hide Tabbar
HideScrollbars	"Hide Scrollbars" add-on removes scrollbars for those who prefer mouse wheel and keyboard navigation.
History Submenus II
HTTP Nowhere	Block unencrypted web traffic for added security.
HTTPS Everywhere	Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
Image Map Editor	Check and editing the image maps inside the web page with magnifying glass.
Image Resizer/Scaler	Simply resize/scale any images on the web by dragging an image!
Image Zoom	Adds zoom and rotation functionality for images...
IpProtocols
Jamendo Album Downloader	Download albums in Ogg Vorbis and MP3 format from www.jamendo.com
jQuery	jQuery and jQuery UI embedded in browser
Keylogger Beater
KillSpinners
Kitsune	Kitsune is a Firefox extension which enables users to input Japanese in Firefox without external Japanse IME.
Launch Clipboard
Leet Key	Transforms typed or static text to L337, ROT13, BASE64, HEX, URL, BIN, DES, AES, Morse code, DVORAK keyboard layout and to lower/to upper case functionality, Leet Font...
Link Password
Link Properties Plus
LinkWalker
list-it
LiveClick	Adds feed reading, notifications, favicons, and other enhancements to Live Bookmarks.
lmnpop
Load Tabs Progressively
Location Guard
Lock The Text
Magic Open Download Folder Button
Mailvelope	Enhance your webmail provider with end-to-end encryption. Secure email communication based on the OpenPGP standard.
Master Password Timeout
Media Loop	Menu item to control HTML5 audio/video loop.
Menu Editor II
Meta Generator Version Check
MicroFox for Firefox	MicroFox is LittleFox, but with retro/micro 8bit graphics. Smallest theme there is for all.
MinUI
MM3 Proxy Switch	In the Firefox Browser (and other Mozilla programs) you can per default configure only the setting for one internet connection. With this Proxy Switch you can manage different configurations and simply switch over between these.
ModestTab
More In Content UI +
Most Recent Tab
MouseControl
Mouseless Browsing	Mouseless Browsing (MLB) enables you to browse the web entirely with the keyboard. The basic principle is to add small boxes with unique ids behind every link and/or form element. You just have to type in the id to trigger the corresponding action i.e. following a link, pressing a button or selecting a textfield...
Move Tabs
Mozilla Labs: Prospector - Instant Preview	Start loading pages as you select them from the location bar suggestions
Multiple Addon Deactivator	Multiple Addon Deactivator (M.A.D) is an addon that can (de)activate one, many or each addon at the same time. Review notes: Absolutely essential to test multiple addons.
My Weekly Browsing Schedule
MySlashKey
MyWords
Nautipolis for Firefox	Nautipolis for Firefox: a blend of retro, nautical, Areo and Gnome. Designed for daily use, with consistent layout, buttons, widgets, with support for many extensions.
New newtab tab	Enchance new tab with some inline content.
New Plugin Disabler	Deactivates new plugins.
New Tab from Location Bar	Opens new tabs from the location bar, by conditions.
New Tab Pro
NewTab Background Shuffler
Newtab Ninja
NextPlease
No Caption	Hide the caption of Firefox
Noise
NoRedirect	NoRedirect lets the user take control of HTTP redirects. Review notes: This is a useful add-on as neither of these browser settings protects against sophisticated popups: Preferences -> Content -> Block pop-up windows [enabled by default] and Preferences -> Advanced -> General -> Warn me when websites try to redirect or reload the page [enabled by default]. This add-on can be used to do that. Blocking redirects are useful to debug redirect based popups but requires specificed domains. RequestPolicy 0.5.28 asks if both popups and redirects should be visited (a feature that has been withdrawn in RequestPolicy Continued starting with version 1.0). However, RequestPolicy is run before uBlock.
Nuvola FF	Theme based on the Nuvola icon set by David Vignoni (http://icon-king.com/?p=15).
Omnibar Plus
Open in Browser	Offers the possibility to display documents in browser window.
Open in Private Browsing Mode	Right-click on a link to instantly open it in Private Browsing mode. (Or right-click anywhere to quickly open private browsing mode.) Review notes: Already integrated in FF ESR
Open Profile Folder
Operator
OPIE (Ordered Preference Import/Export)
OPML Support
OverbiteFF	Add legacy protocol support back to Firefox and SeaMonkey with OverbiteFF, which restores support for Gopher servers, plus CSO/ph searches, finger, whois and more! Cross-platform JavaScript runs anywhere Firefox does.
Paragrasp	Paragrasp is an absolute necessity for anyone who frequently reads blogs, articles, and news stories online. This Firefox extension adds a highlight to the paragraph you're reading, and with a single keystroke, moves to the next, automatically...
Password Tags
Pentadactyl	Vim-inspired, keyboard-accessible user interface for Iceweasel/Firefox
Personas Shuffler
Places' Tooltips
Plain Text Links	With any text that can be treated as a URL, using this extension you can right click on the text and select "Open this URL".
Plugin Disabler	Deactivates all plugins on startup.
Print selected text
Progre
Pure URL	Removes garbage like "utm_source" from URLs
Puzzle Toolbars	Piece together all of your add-on buttons and extras into your browser window in exactly the way you want them!
QuickMark
QuickPasswords
QuickToolbars
QuoteURLText
Ratings Preview for YouTube
Re-Pagination	Review notes: Useful to download large amount of data.
RECAP	Improves PACER, the electronic public access system for the U.S. Federal District and Bankruptcy Courts.
Red Cats (green flavor)	There can never be too many cats! Turn your Firefox into Firecat and enjoy browsing in the furry company. The theme also comes in green flavor. Beta version for Firefox 32.x -38.x is currently available at the support forum and the home page.
RequestPolicy Sync	Sync engine for RequestPolicy.
ResetSearchbar
Right Links
Right-Click-Link	Opens selected text in a new tab.
RSS Feed Icon in Navbar	Add an RSS feed icon to the navbar.
Save Link in Folder
Save-To-Read
Saved Passwords Button
SavedSearchButton
SaveLink
Scientific Calculator Toolbar	A full-featured scientific calculator which can be placed in any Firefox tool-bar or the Australis PanelUI.
ScrapBook Plus 2	Attention! Alpha version! Do not use as a replacement for ScrapBook Plus 1! Review notes: Alpha version.
Scribblies Brite	A brightly colored theme with fun icons. The juggler juggles his balls while pages load.
Scribblies Plain	A fun theme with a plain background. Be sure to watch the juggler juggling his balls while pages load.
ScribeFire Next
Scroll Progress	When scrolling vertically, shows a percentage indicator displaying how far down has been scrolled on the page.
Scroll Search Engines
Scroll To Top	A plugin to scroll to top and vice versa of a window. It is really beautiful and is highly customizable..
Scroll Up Folder
Search on Engine Change	Automatically searches for the text in the search box when another search engine is selected.
Search Site
Search term highlighter	Review notes: This acheive the same function as “Highlight all” in IceCat's inbuilt Find. The difference is that if you uncheck the "Auto-clear keyword list" preference in “General -> Group 2”, Search term highlighter will keep the last keyword list. This add-on match any keyword(s) on all page(s), not unique marking(s) on unique page(s) like textMarker.
searchOnTab	This extension allows users to select where are loaded the results of the search bar...
SearchThisSite
Security Tab Colorizer	When installed this addon will colorize your tabs depending on the protocol they use (currently [http/https red/green respectively] only). So you would know if you are browsing through a secured connection even if you have hidden the navigation bar.
SelectBoxTools
Selected Search
SelectionSK
Semantic Radar
Send Link in context menu
Send Tab URLs
SenSEO	SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.
Server Spy	Server Spy indicates what brand of HTTP server (e.g. Apache, IIS, etc.) runs on the visited sites.
Show Anchors 2
Show Parent Folder
Sidebar Auto Show/Hide	Automatically shows the sidebar when the mouse cursor touches the left window border, and closes it when the cursor is over the web page. Review notes: Consumes way less CPU than All-in-One Sidebar (AiOS)
Sidebar Bookmarks Search Plus	A tree of the bookmarks is displayed under search results of the sidebar bookmarks.
Sidebars List	Adds drop-down list to switch sidebars Review notes: “I personally find it simpler and more convenient than Omnisidebar. “ - https://addons.mozilla.org/en-US/firefox/collections/ChessWriter/my/?page=25 Consumes less CPU
Simple Clocks
Simple Mail
Simple Tab Switch with Arrow Keys	Fast and easy tab switching with the arrow keys. Review notes: Breaks the standard jump one word to the left / to the right of item name for the text cursor.
Simplify Awesome Bar
Smart Find
Smart Referer	Send referers only when staying on the same domain. You can whitelist domains with wildcards and configure other things, look in the preferences page of the addon in the addon manager.
SmartPager
SmileySidebar
Sort Tabs Command
Space Next
SSleuth	How strong is your HTTPS connection? SSleuth ranks an established SSL/TLS connection and gives a brief summary of the cipher suite, certificate and other SSL/TLS parameters.
Stay-Open Menu
storeTab
Stylish Tools
stylishsync	Sync engine for Stylish with backup / restore facility.
Switch to Tab no more	Disables the Switch to Tab function. Review notes: Read http://www.technospot.net/blogs/how-to-disable-switch-to-tab-in-firefox/
Tab Data (+Memory usage)	Provides user with tab related stats and memory usage
Tab Flick	Review notes: The tab-window drop is default, this add-on only add the drop-to-windows thumbnails.
Tab Focus	Review notes: Switch to tabs withouts mouse clicks.
Tab History Menu (modified)
Tab Scope Tweaker
TabClearSearch3
TabCloser
TabGroups Menu
Tabhunter
Tabs Menu
tabTooltip
TagSpaces
Terms of Service Didn’t Read	“I have read and agree to the Terms” is the biggest lie on the web. We aim to fix that. Get informed instantly about websites' terms & privacy policies, with ratings and summaries from the tosdr.org initiative.
textMarker	Review notes: Each keyword/position/page is saved unique in jetpack/textMarker@underFlyingBirches.org/simple-storage/store.json.
Toggle Word Wrap
Togglify Add-on Toggler
Toolbar Autohide	Enables automatic hiding of toolbars (tabs, navigation, bookmarks and add-on bar) via context menu options. When hiding, toolbars will appear when the mouse is at the top of the window or when activated by keyboard (e.g. Ctrl-l, Ctrl-k, F10). Review notes: Preferred in GNU IceCat over The Fox, Only Better that unfortunate have some mouse hover issues.
Tranquility	Makes a Web Page readable.
TrayHotKey
Turn Off the Lights Mini	Dims the brightness level of your browser’s background and lets you enjoy watching a video online. No fancy extras, just lightweight, perfect darkness!
TweakMDB - IMDB Video Downloader & More
uggc protocol	ROT-13 http:// (uggc://) URLs should just work.
Undo Bookmarks Menu
Undo Tab Operations
Unicode Input Tool Converter	Unicode lookup and chart view to find international characters or symbols; converts among HTML/XML entities, numeric character references (hex and dec), CSS/JavaScript/PHP6 escape sequences, and Unicode; allows saving of snippets to paste
uniqtabs (Unique Tabs)
Universal Edit Button	Auto-discovery button for wiki websites
Unsorted Bookmarks Folder Menu
UploadProgress	Displays the progress of the current uploads. Useful for sites that does not shows the upload progress like youtube.
URL Logger
URL Tooltip
URL Tooltip for Firefox 15+	Displays target URL in tooltips.
User-Agent JS Fixer	Extends the functionality of other User-Agent addons, allowing them to modify the User-Agent for JavaScript code. Review notes: “This addon can change the JavaScript User-Agent on a per-site basis, rather than changing for the whole session. It does nothing by itself, but it complements the functionality of another addon like UAControl109 or ua-site-switch110.”
View Dependencies
View Frames
VimFx	VimFx introduces Vim-style keyboard shortcuts for browsing and navigation without using the mouse.
Visual Hashing
WCAG Contrast checker	Checks for compliance with the contrast levels, brightness and shine in the color combination of foreground and background of textual content based on the requirements of WCAG 1 and WCAG 2.
WebODF	Viewer for OpenDocument Format office files. It can display documents saved from LibreOffice, OpenOffice, Calligra, Abiword, Microsoft Word, Excel, PowerPoint. The documents should be saved in the OpenDocument Format. Review notes: MozPlugger can be used instead
WikiLook	Leading dictionary lookup add-on. Fast, light, open source tool that define words for you without need to open new tabs or windows. Wiktionary&Wikipedia. Ctrl or Shift or Alt + RightMouseButton click. Now with thesaurus. 70+ languages supported!
WikiMatrix	This extension makes comparison pages of wikipedia.org a lot more usable by making it possible to remove and restore rows in each table with a simple mouse click. Review notes: Editing
WorldClient WebMail Notifier	Checks for new mails in the MDaemon Email Server.
Xinha Here!
Y++	Y++ use Youtube videos (music, humor, gaming, etc...) in order to create an endless video stream according to your taste and mood.
YouTube Embed2Link
YouTube Grid Search and Preview Player
µBlock Origin	Finally, an efficient blocker. Easy on CPU and memory. Review notes: uBlock fork with GNU.org privacy list added

eID

Belgium eID	Use the Belgian electronic identity card (eID) in Firefox
Estonian ID Card PKCS11 module loader	Estonian ID Card PKCS11 module loader

OpenSearch

DDG onion lite	Search add on for the DuckDuckGo hidden service on Tor (3g2upl4pq6kufc4m.onion). Lite version (no javascript).
DuckDuckGo (non-JS Lite SSL)	DuckDuckGo is the search engine that doesn't track you. We also have smarter answers and less clutter. This extension adds DuckDuckGo (non-JS Lite version) to the search bar. For more features, see the DuckDuckGo Plus add-on. Enjoy!
DuckDuckGo (non-JS SSL)	DuckDuckGo is the search engine that doesn't track you. We also have smarter answers and less clutter. This extension adds DuckDuckGo (non-JS HTML version) to the search bar. For more features, see the DuckDuckGo Plus add-on. Enjoy!
Free Software Directory search	This is a search plugin for the Free Software Directory, a catalog of useful free software that runs under free operating systems.
GoogleTranslate	Automatically translate from any language to your language.
Ixquick HTTPS Privacy Search Engine	Ixquick does not record your IP address. Search the Web in the best possible privacy!
Searx.me search	Search searx.me, a hackable metasearch engine.
Startpage (SSL)	Startpage is a search engine that does not collect or share personally identifiable information. This search bar add-on utilizes SSL to protect searches between You and Startpage.
Wikileaks Search	This addon simply allows you to search the archives of Wikileaks
Wikipedia (SSL)	Wikipedia is an openly-editable, free content internet encyclopedia. This search bar add-on utilizes SSL to protect searches between You and Wikipedia.

Non-free software claimed to be free, contact developer

1-Click YouTube Video Download	The simplest YouTube Video Downloader for all YouTube Flash sites, period. Review notes: “This is proprietary software. It is licensed all rights reserved only.” - Joshua Gay 2015-05-01
Screengrab (fix version)	Screengrab! saves webpages as images.