User-Agent Switcher
Quickly and easily switch between popular user-agent strings.
69,461 users
Font Finder (revived)
Get all CSS styles of selected text
20,544 users
Ghostery – Privacy Ad Blocker
Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.
1,054,909 users
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.
182,053 users
Octotree
Add-on to display GitHub code in tree format
9,261 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.
9,420 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!
23,283 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+ ]
11,345 users
Selenium IDE: Screen Capture Extension
Extension to Selenium IDE for various screen capture capabilities.
2,096 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)
2,987 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
7,608 users
Scopus Document Download Manager
Download PDF files directly from Scopus!
7,858 users