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Fox!Box

Assign the FRITZ!Box to reconnect.

Rated 4 out of 5 stars (131)
18,930 users

AutoCopy 2

Copies selected text to the clipboard automatically.

Rated 5 out of 5 stars (62)
18,058 users

Add-ons Manager Context Menu Featured

Add more items to Add-ons Manager context menu.

Rated 5 out of 5 stars (35)
17,997 users

BBSFox

telnet client extension specifically designed for BBS browsing.
It support mouse browsing and FireGestures script.

Rated 5 out of 5 stars (30)
17,301 users

AutoPagerize No Restart

A browser Extension for auto loading paginated web pages

Rated 4 out of 5 stars (45)
15,805 users

AutoCopy

Select text and it's automatically copied to the clipboard. Also pastes on middle click.

Rated 4 out of 5 stars (523)
15,671 users

PDF Mage No Restart

Save any page as PDF

Rated 4 out of 5 stars (30)
15,404 users

GoToMeeting Extension for Google Calendar No Restart

Easily schedule GoToMeeting sessions directly from your Google Calendar.

Rated 4 out of 5 stars (3)
14,896 users

Snagit Autoscroll Helper

Helps Snagit capture whole pages instantly

Rated 2 out of 5 stars (28)
14,199 users

GPO support For Firefox and Thunderbird No Restart

Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using GPOs

Rated 4 out of 5 stars (10)
13,599 users

YouTube Plus No Restart

YouTube with more freedom.

Rated 5 out of 5 stars (51)
13,244 users

FB2 Reader

Allows reading FictionBook files with Firefox

Rated 5 out of 5 stars (37)
13,146 users

MinimizeToTray Plus

Note from Mozilla: This add-on has been discontinued. Try MinimizeToTray Revived instead.

Minimize applications to the system tray.

Rated 4 out of 5 stars (193)
13,109 users

h264ify No Restart

Makes YouTube stream H.264 videos instead of VP8/VP9 videos

Rated 5 out of 5 stars (10)
12,621 users

Auto Form

Copy/Paste all fields from a web form in one click.

Rated 3 out of 5 stars (16)
12,490 users

AutoPager Fixed

AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages.

ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON!

Rated 4 out of 5 stars (58)
12,033 users

FoxReplace

Lets you replace text in web pages. You can define a substitution list and apply it automatically or at your own discretion, or make individual substitutions. You can use this as a filter, or just for fun :)

Rated 4 out of 5 stars (160)
11,993 users

Mouse Gestures Suite

Mouse gestures for SeaMonkey & Firefox: navigate & execute commands using mouse gestures (with single mouse button) and rocker gestures (by pressing 2 mouse buttons). Also: scroll wheel navigation, page scrolling, tab scrolling.

Rated 5 out of 5 stars (31)
11,892 users

URL Link

URL Link is a small Firefox and Thunderbird extension that allows you to select a non-URL in a mail/news message or web-page, and open it in a browser window.

Rated 4 out of 5 stars (50)
11,787 users

Link Gopher

Extracts all links from web page, sorts them, removes duplicates, and displays them in a new tab for inspection or copy and paste into other systems.

Rated 4 out of 5 stars (58)
11,119 users