User-Agent Switcher
Spoofs User-Agent strings of your browser
9,424 users
Tab2QR
Send the page you are currently viewing to your mobile device. QR codes are generated instantly in browser and never leave your computer. Implemented with WebExtensions API and compatible with Firefox 57+.
5,234 users
Tab Reloader (page auto refresh)
An easy-to-use tab reloader with custom reloading time settings for individual tabs
14,583 users
Awesome Screenshot Plus - Capture, Annotate & More
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!
293,596 users
Octotree
Add-on to display GitHub code in tree format
9,092 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.
9,185 users
Classic Toolbar Buttons [Fx45-56][Tb24-58]
'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. Beta builds on versions page!
23,065 users
NewScrollbars (aka NoiaScrollbars) [Fx/Tb 10-56]
The "NewScrollbars"-extension replaces default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes". [ not compatible with Firefox / Thunderbird 57+ ]
11,219 users
Selenium IDE: Screen Capture Extension
Extension to Selenium IDE for various screen capture capabilities.
2,050 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)
2,781 users
CookieSwap
NOTE REGARDING COMPATIBILITY WITH FIREFOX QUANTUM: Due to the major changes in Firefox in version 57, I've started to rewrite CookieSwap but I don't it being completed before Jan 2018. Sorry for the delay! -Steve
7,594 users
Custom Buttons
Gives a possibility to create custom toolbarbuttons...
9,079 users