My Favorite Add-ons

by Ali

29 Add-ons in this Collection

Flash Video Downloader - YouTube HD Download [4K] by FVD Media

Rated 4 out of 5 stars 4,141 reviews

712,374 users

★ Most popular and ONLY ★ Video Downloader that downloads most of the Streaming Videos, YouTube 4K and Full HD. Flash Video Downloader helps you to download any video from YouTube, Facebook, etc. You can download mp3, music and more.

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,591 reviews

907,910 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Stylish - Custom themes for any website by

Rated 4 out of 5 stars 1,257 reviews

326,593 users

Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.

Web Developer by chrispederick

Rated 4 out of 5 stars 465 reviews

268,036 users

The Web Developer extension adds various web developer tools to the browser.

Save as PDF by Pdfcrowd Team

Lets you download web pages as PDF in one click.

Kee by Luckyrat

Rated 5 out of 5 stars 1,284 reviews

55,974 users

Kee adds free, secure and easy password management features to your browser which save time and keep your private data more secure.

Powered by KeePass Password Safe (additional installation of this free open-source program is required).

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

Rated 4 out of 5 stars 531 reviews

147,259 users

This add-on allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Note: This add-on won't work in Firefox 57. It may eventually if the APIs to access passwords are implemented.

Lightshot (screenshot tool) by Serg at SkillBrains, Andrej at SkillBrains

Rated 5 out of 5 stars 206 reviews

43,764 users

Easy and convenient screenshot tool. Allows you to make screenshots of any selected area (video and flash too), edit and upload it to server.

Empty Cache Button by mvm

Rated 4 out of 5 stars 125 reviews

47,138 users

Cache clearing made easy. One click.

Html Validator by Marc Gueury

Rated 4 out of 5 stars 211 reviews

31,651 users

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Firefox 56, use 0.974 (see all versions below).
For Firefox 57, see Web Extensions.

Form History Control by Stephan Mahieu

Rated 5 out of 5 stars 113 reviews

19,915 users

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 363 reviews

65,423 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Master Password+ by V@no

Rated 4 out of 5 stars 168 reviews

14,790 users

Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows

FlashFirebug by O-Minds

Rated 4 out of 5 stars 5 reviews

11,806 users

Debug Flash/SWF files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer. (NOW SUCCEEDED BY FLASH DEBUGGER. CHECK ADDON DESCRIPTION)

Cookie Controller by iann

Rated 4 out of 5 stars 96 reviews

18,145 users

Buttons for managing site cookie permissions, switching global cookie permissions on and off, browsing cookies, and removing cookies. The same functions are included for local and session storage.
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