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The Night Owl No Restart
Night mode for Firefox. If You're night owl, You'll love it. It's way easier to use it than to describe it. Part of Just Disable Stuff 1.2, extracted out into distinct plugin to keep JDS KISS-ish.
CoLT (short for "Copy Link Text") makes it easy to copy either a link's text, or both the link text and its URL in a format you specify. This non-invasive extension simply appears as context menu items when you right-click a link. Fully customizable!
User-Agent Switcher No Restart
Quickly and easily switch between popular user-agent strings.
Untrusted Add-on Switcher No Restart
Turns on and off untrusted Firefox add-ons. Works only for Firefox 40-43!
Codecademy Redesigned No Restart
Improves your experience on Codecademy, re-styling the Q&A forums into a sleeker look and adding many new useful features
React Developer Tools No Restart
React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more. To get started, just open the Firefox devtools and switch to the React tab.
SisBugs No Restart
Bug do sistema
Page Performance Test No Restart
Get accurate performance timing for any page with this extension
ScheckProKeyword No Restart
Search keyword position in google
Random Agent Spoofer No Restart
Rotates complete browser profiles ( from real browsers / devices ) at a user defined time interval. It includes many extra privacy enhancing options
Octotree No Restart
Add-on to display GitHub code in tree format
Doocle Screen Sharing extension No Restart
Doocle Screen Sharing extension
The "NewScrollbars"-extension replaces the default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes".
Firefox 32 zoom bug with custom scrollbars got fixed in Firefox 33 beta 6, Aurora and Nightly!
wiiApp No Restart
Remote XUL Manager No Restart
Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.
NoScript Security Suite Featured
The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
FireQuery No Restart
Firebug plugin for jQuery development
Universal Item Sorter No Restart
Select a list of items, the unit to sort and the item from a page and sort them in descending order
GitHub - Readme Table of Contents No Restart
Table of Contents for Readmes in GitHub Repos, Gists and Wikis.