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QuoteCollapse Requires Restart

Collapse and expand quotes. Please see the extension homepage for...

Rated 4 out of 5 stars (26)
10,729 users

Rai Smooth Streaming Player (raismth) Requires Restart

Rai.tv live channels, vod and replay contents w/o *light (Silverlight/Moonlight)

Rated 5 out of 5 stars (46)
3,707 users

Rainbowpicker Requires Restart

Pick any color of the...

Rated 4 out of 5 stars (19)
713 users

Random Theme Switcher Requires Restart

This extension switches your themes at random.

Rated 4 out of 5 stars (7)
79 users

RC Print Requires Restart

Adds a "Print" option to the Right-Click context menu.

Rated 5 out of 5 stars (2)
1,660 users

Re-Pagination

See more search results etc. on one page, concatenating several pages together...

Rated 4 out of 5 stars (52)
5,072 users

Reader

Reader is the ultimate Reader tool for Firefox.

Rated 5 out of 5 stars (58)
35,815 users

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.

Rated 4 out of 5 stars (13)
5,720 users

Reddit History

Keeps track of all the submissions you viewed on Reddit

Not yet rated
65 users

Redirect Bypasser

Avoid redirects and has direct access to the sites you want to visit.

Rated 4 out of 5 stars (37)
11,201 users

RefControl Requires Restart

Control what gets sent as the HTTP Referer on a per-site basis.

Rated 4 out of 5 stars (186)
78,345 users

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.

Rated 2 out of 5 stars (4)
33 users

Reload Skip Cache Button

Reload page without using content stored in the browser cache to make sure you get any updates.

Rated 3 out of 5 stars (2)
771 users

ReloadPAC Requires Restart

Workaround for Bug 351163 (Thunderbird bypasses proxy.pac for first connection).

Not yet rated
8 users

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...

Rated 5 out of 5 stars (66)
2,729 users

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.

Rated 4 out of 5 stars (528)
81,778 users

RemindMeBot-Reddit

All the great features of /u/RemindMeBot in a quick and easy to use extension!

Not yet rated
89 users

Remote Developer Tools Server

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.

Not yet rated
20 users

Remote XUL Manager

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.

Rated 5 out of 5 stars (36)
82,795 users

Replace Quotation Marks Requires Restart

Replace quotation marks from " ", ' ' to „ ” , ‚’ in text areas.

Not yet rated
3 users