Up & Coming Extensions

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Dark Mode (WebExtension) Compatible with Firefox 57+

A global dark theme for the web

Rated 4 out of 5 stars (51)
8,550 users

Quick Locale Switcher Requires Restart

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 3 out of 5 stars (87)
194,122 users

YouTube™ Downloader Lite Compatible with Firefox 57+

A very lite YouTube downloader (FLV, WebM, 3GP, and MP4)

Rated 4 out of 5 stars (88)
31,074 users

Download Gram Video/Photo (Instagram Downloader) Compatible with Firefox 57+

"1-Click" download any video or photo from Instagram.

Rated 5 out of 5 stars (17)
1,641 users

Cookies Exterminator

Auto delete cookies and localStorage objects as soon as they become unused

Rated 5 out of 5 stars (13)
2,098 users

Link Cleaner Compatible with Firefox 57+

Clean URLs that are about to be visited:
- removes utm_* parameters
- on item pages of aliexpress and amazon, removes tracking parameters
- skip redirect pages of facebook, steam and reddit

Rated 4 out of 5 stars (24)
3,127 users

Online.FM radio Requires Restart

With internet-radio Online.FM you can listen to 18 unique music channels: Trance, Party, Disco, R'n'B, Latino, Classic rock, House, Relax, Ukrainian rock, Ukrainian pop, Ukrainian folk, Romantic music channel, Kinder and two author's channels.

Rated 3 out of 5 stars (48)
1,648 users

Email Extractor Requires Restart

Extracts all the emails in from the current browser tab and/or the entire browser tabs

Rated 4 out of 5 stars (19)
6,715 users

TubeUnblock Compatible with Firefox 57+

TubeUnblock

Rated 4 out of 5 stars (5)
1,123 users

Biobar Requires Restart

A power browsing toolbar for the Life Sciences (Biology/Bioinformatics/Medicine). Easily search and retrieve data from over 45 bioinformatics services from the comfort of the toolbar. Links to bioinformatics tools and resources.

Rated 5 out of 5 stars (11)
1,145 users

Redux DevTools Compatible with Firefox 57+

DevTools for Redux with actions history, undo and replay.

Rated 5 out of 5 stars (5)
4,230 users

HD Youtube Downloader Compatible with Firefox 57+

Download youtube videos in highest available quality with new tab page.

Rated 2 out of 5 stars (42)
13,252 users

Save Page WE Compatible with Firefox 57+

Save a complete web page (or just its current state) as a single HTML enhanced file that can be displayed in any browser.

Rated 4 out of 5 stars (19)
1,694 users

Youku HTML5 Player Compatible with Firefox 57+

Farewell to flash and ads.

Rated 5 out of 5 stars (25)
2,301 users

Cisco Jabber Guest Compatible with Firefox 57+

Enable use of the Cisco Jabber Guest add-on for public-to-business voice and video calls.

Rated 5 out of 5 stars (2)
2,496 users

Slither.io Mods, Zoom, Unlock Skins, Bots Compatible with Firefox 57+

The Best Mod and Extension for Slither.io! Mod Zoom, Play with Friends, Skins, Custom Skins, Bots

Rated 5 out of 5 stars (5)
1,112 users

Multiple-Highlighter

Highlights multiple words or regular expressions using different colors

Rated 4 out of 5 stars (13)
2,154 users

Click&Clean Requires Restart

The quick and easy way to delete your browsing history, erase all temporary internet files, remove downloaded files history, cookies, Flash LSO, typed URLs. Allows to delete private data when Firefox closes. Supported ext. tools like CCleaner.

Rated 5 out of 5 stars (115)
121,488 users

Live HTTP Headers (clone)

View HTTP headers of a page and while browsing.

This is an unofficial "Live HTTP headers" clone, mainly to fix the Replay feature!

Rated 4 out of 5 stars (10)
7,620 users