Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
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.
275,334 users
uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
5,047,669 users
Webmail Ad Blocker
Expand your email area by blocking and removing ads on the right hand side of the screen when using Gmail, Hotmail, Outlook.com and Yahoo Mail.
52,758 users
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.
39,652 users
Classic Theme Restorer (Fx29-56)
Squared tabs, application menu, add-on bar, small button view and many more 'old' features for 'Firefox 29-56', not for Firefox 57+! Release builds Beta builds
243,461 users
Tab Groups
Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.
66,570 users
TableTools2 - Copy/Sort/Chart/Filter Table&More!
Does everything for an HTML table: Copy (table/row/column/cell), Sort (multi-column), Search (regex, range operations ...), Filter, Chart, Statistics, Rearrange, Combine/Compare. To use: Right click in a real HTML table for the "tabletools2" option.
9,095 users
Octotree
Add-on to display GitHub code in tree format
9,060 users
谷歌翻译 - 智能云翻译
本插件使用谷歌翻译引擎，可在任意网页中选词进行智能翻译。
815 users
Selenium IDE: Screen Capture Extension
Extension to Selenium IDE for various screen capture capabilities.
2,053 users
Page Translate
Translate whole page using Google Translate
2,023 users
ErrorZilla Plus
This extension is a replacement of Firefox official error page, which adds some useful tools to aid your troubleshooting. The tools include: - Google Cache (view the page cached by Google) - Coralize (use Coral CDN proxy to connect again) - Wayback (view an earlier version of this page) - Ping (use a server to ping the target server) - Trace (trace the network route from you to the server) - Whois (look up who owns the website) - Proxify (use your custom web proxy to connect)
3,155 users