Featured Extensions

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Font Finder (revived) Compatible with Firefox 57+ Featured

Get all CSS styles of selected text

Rated 5 out of 5 stars (26)
11,271 users

Grammarly for Firefox Compatible with Firefox 57+ Featured

Grammarly will help you communicate more effectively. As you type, Grammarly flags mistakes and helps you make sure your messages, documents, and social media posts are clear, mistake-free, and impactful.

Rated 4 out of 5 stars (226)
448,213 users

Zoom Page WE Compatible with Firefox 57+ Featured

Zoom web pages (either per-site or per-tab) using full-page zoom, text-only zoom, automatic fit-to-width and minimum font size.

Rated 4 out of 5 stars (60)
26,424 users

Easy Youtube Video Downloader Express Compatible with Firefox 57+ Featured

WORKS WITH NEW YOUTUBE LAYOUT, "Best Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.

Rated 4 out of 5 stars (1,473)
256,654 users

YouTube™ Flash-HTML5 Compatible with Firefox 57+ Featured

Play YouTube™ Videos in Flash or HTML5 Player

Rated 4 out of 5 stars (63)
45,575 users

Wikipedia Peek Compatible with Firefox 57+ Featured

Shows previews of linked articles on Wikipedia pages.

Rated 4 out of 5 stars (16)
2,603 users

YouTube in HD (720p, 1080p, 1440p, 2160p) Compatible with Firefox 57+ Featured

Watch YouTube in the full-HD quality or the highest available one

Rated 4 out of 5 stars (44)
7,067 users

Bloody Vikings! Compatible with Firefox 57+ Featured

Simplifies the use of temporary e-mail addresses in order to protect your real address from spam. Supports inter alia 10minutemail.com and anonbox.net.

Rated 5 out of 5 stars (69)
13,011 users

Honey Compatible with Firefox 57+ Featured

Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.

Rated 4 out of 5 stars (215)
131,749 users

YouTube High Definition Compatible with Firefox 57+ Featured

YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.

Rated 5 out of 5 stars (306)
346,757 users

Google™ Translator Lite Compatible with Firefox 57+ Featured

a powerful tool to translate words or sentences

Rated 4 out of 5 stars (50)
37,133 users

Awesome Screenshot Plus - Capture, Annotate & More Compatible with Firefox 57+ Featured

Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!

Rated 4 out of 5 stars (1,650)
400,307 users

Tile Tabs WE Compatible with Firefox 57+ Featured

Take tabs from a parent window and arrange them in a layout of tiled sub-windows, using the toolbar button, context menu or keyboard shortcuts. Makes it easy to browse, compare or monitor multiple pages. Synchronize scroll. Save and re-open layouts.

Rated 2 out of 5 stars (80)
18,366 users

Instant Translate: Ultimate Translator Compatible with Firefox 57+ Featured

Translator, dictionary and text-to-speech for 103 languages. Select and translate on any page with a shortcut on double-click.

Rated 4 out of 5 stars (213)
26,319 users

To Google Translate Compatible with Firefox 57+ Featured

Right-click on a section of text and click on Translate icon next to it to translate or listen it to your language.

Rated 4 out of 5 stars (336)
84,348 users

Reader Compatible with Firefox 57+ Featured

Reader is the ultimate Reader tool for Firefox.

Rated 5 out of 5 stars (89)
23,708 users

LanguageTool Grammar Checker Compatible with Firefox 57+ Featured

With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

Rated 4 out of 5 stars (38)
96,873 users

Country Flags & IP Whois Compatible with Firefox 57+ Featured

Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon

Rated 5 out of 5 stars (42)
5,187 users

Google search link fix Compatible with Firefox 57+ Featured

This extension prevents Google and Yandex search pages from modifying search result links when you click them. This is useful when copying links but it also helps privacy by preventing the search engines from recording your clicks.

Rated 5 out of 5 stars (242)
62,960 users

Youtube Dark Mode Compatible with Firefox 57+ Featured

Switch youtube to dark mode. Dark mode will help devices save battery and useful for your sleeping. Make donation for us http://www.paypal.me/hoangthanh. Thank you!

Rated 5 out of 5 stars (107)
7,148 users