Extensions by Name
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.
ReloadPAC Requires Restart
Workaround for Bug 351163 (Thunderbird bypasses proxy.pac for first connection).
Remember Mismatched Domains Requires Restart
The Remember Mismatched Domains extension for Firefox and Thunderbird adds a "Don't warn me again about this certificate for this domain" checkbox to the Domain Mismatch and Expired Certificate warning windows. When selected the domain...
ReminderFox Requires Restart Featured
ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.
All the great features of /u/RemindMeBot in a quick and easy to use extension!
This addon provides options for starting the developer tools server. It is especially valuable in XULRunner Apps where there is no UI to start the server.
NOTE: This addon is not mandatory in Firefox or Thunderbird, as support is built in.
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.