Extensions by Name
quickFilters Requires Restart
Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.
QuickFolders (Tabbed Folders) Requires Restart
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
QuickNote Requires Restart
A simple note-taking extension.
QuickPasswords Requires Restart
Retrieve your Passwords the quick way! Never retype or display your secure passwords on screen anymore - put the password where you need it - the login form or the clipboard.
Now also includes SSO change (multi-domain pw) and Backup + Restore.
Quitomzilla Requires Restart
Quitomzilla helps you quit smoking while you surf the web or wait for new emails, showing the cigarettes, money and time you have saved since you quit...
Quote Colors Requires Restart
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
QuoteCollapse Requires Restart
Collapse and expand quotes. Please see the extension homepage for...
Rai Smooth Streaming Player (raismth) Requires Restart
Rai.tv live channels, vod and replay contents w/o *light (Silverlight/Moonlight)
Rainbowpicker Requires Restart
Pick any color of the...
Random Theme Switcher Requires Restart
This extension switches your themes at random.
RC Print Requires Restart
Adds a "Print" option to the Right-Click context menu.
See more search results etc. on one page, concatenating several pages together...
Reader is the ultimate Reader tool for Firefox.
Rebrand Requires Restart
This wizard creates an XPI that rebrands Firefox, SeaMonkey or Thunderbird. You can change the brand name as well as the brand images and icons.
Keeps track of all the submissions you viewed on Reddit
Avoid redirects and has direct access to the sites you want to visit.
RefControl Requires Restart
Control what gets sent as the HTTP Referer on a per-site basis.
Relaxed the HTML Validator Requires Restart
"Relaxed" is a HTML validator which validates HTML documents using it's own schema definitions written in Relax NG with embedded Schematron patterns.
Reload page without using content stored in the browser cache to make sure you get any updates.