Extensions by Name
Statusbar button to turn the proxy on and off with a single click.
Enable Proxy from single click
Displays a QRCode(tm) in Page Info
Ever needed to restart Firefox after enabling or disabling an extension, switching to a new theme, or modifying configuration files (such as userChrome.css or user.js)?
This simple extension adds a "Restart Firefox" item to the "File" menu. You can ...
Quicksearch - удобный способ поиска выделенного текста на веб-странице. (Quicksearch is a convenient way to search selected text on a web page. It opens search block above where you can choose search engine.)
quickseeker No Restart
a basic add-on
Ever tired of searching Google for finding out the synonym of a word...Try out this add-on, it saves you the time as you can view the synonym of the word by just selecting and right clicking on it ! Moreover this addon does not rely on the internet !
QuickTab No Restart
Long Press Open New Tab Browser Extension
With this add-on, you can have the Transport for London Journey Planner always at your fingertip!
Allows to show or hide firefox and add-ons toolbars with a single click.
Though the add-on is still partially working, it is no longer in development.
Quick post tweet on firefox
A tool to preview any link / phrase and check WhoSpoke - opinions of others..
Quick lookup in Wiktionary and Wikipedia, without the need to open a new tab.
Just right-click a word while shift / ctrl / alt is pressed.
QuickWikiEditor No Restart
Edittool for Wikipediaauthors – With this add-on it is possible to make little edits to wiki-articles without having to leave or reload the page, so the flow in reading an article is barely disturbed.
Quidco is the UK's number 1 cashback site. Never miss out on cashback ever again with the Quidco Cashback Reminder. Our new add on, displays no toolbar which may affect the view of your browser and is now compatible at over 4,200 retailers.
Adds a page to Quiet Read
QuietUrl automatically converts mistyped or obfuscated URLs to valid ones, can obfuscate URLs on form submission for privacy and it also creates clickable links from text URLs, which works with incomplete URLs as well, like those in YouTube comments.