Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Country Flags & IP Whois
Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon
23,559 users
Cookie AutoDelete
Control your cookies! This WebExtension is inspired by Self Destructing Cookies. When a tab closes, any cookies not being used are automatically deleted. Whitelist the ones you trust while deleting the rest. Support for Container Tabs.
104,916 users
Popup Blocker (strict)
Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address
33,959 users
Font Finder (revived)
Get all CSS styles of selected text
19,463 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
242,235 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.
66,044 users
Octotree
Add-on to display GitHub code in tree format
8,824 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.
8,886 users
Selenium IDE: Screen Capture Extension
Extension to Selenium IDE for various screen capture capabilities.
1,995 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)
2,529 users
Page Translate
Translate whole page using Google Translate
1,600 users
Youtube Dark Mode
Switch Youtube to dark mode. Dark mode will help devices save battery and reduces strain on your eyes.
2,625 users