Extensões mais populares

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User Agent Switcher Reinício necessário

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Avaliado em 4 de 5 estrelas (265)
293 173 utilizadores

Xmarks Sync Reinício necessário

NOTE: Xmarks lives! Learn more at http://blog.xmarks.com . Xmarks is the #1 bookmarking add-on. Keep your bookmarks, passwords and open tabs backed up and synchronized across computers and browsers.

Avaliado em 4 de 5 estrelas (2 585)
283 658 utilizadores

Easy Youtube Video Downloader Express

"#1 Rated Firefox 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.

Avaliado em 4 de 5 estrelas (1 002)
279 003 utilizadores

YouTube High Definition

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.

Avaliado em 5 de 5 estrelas (245)
277 063 utilizadores

Session Manager

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

Avaliado em 4 de 5 estrelas (496)
273 101 utilizadores

YouTube Flash Video Player

YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.

Avaliado em 5 de 5 estrelas (51)
268 773 utilizadores

HTTPS Everywhere Reinício necessário

Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

Avaliado em 4 de 5 estrelas (123)
266 589 utilizadores

Personas Plus

Personas (now known as lightweight themes) are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite themes.

Avaliado em 3 de 5 estrelas (939)
253 869 utilizadores

FoxyProxy Standard Reinício necessário

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

Avaliado em 4 de 5 estrelas (367)
248 575 utilizadores

Full Web Page Screenshots (♥♥♥♥♥) Reinício necessário

FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV

Screenshots can be quickly captured and:

― Saved as Image or PDF
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

Avaliado em 5 de 5 estrelas (473)
248 364 utilizadores

NetVideoHunter Reinício necessário

This add-on is a downloader that lets you easily download videos from sites like Youtube, Facebook, Metacafe, Dailymotion, Break, VKontakte and music for example from SoundCloud, Grooveshark and from many other sites...

Avaliado em 4 de 5 estrelas (390)
241 040 utilizadores

Download Status Bar

If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.

Avaliado em 5 de 5 estrelas (336)
220 147 utilizadores

ColorZilla Reinício necessário

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Avaliado em 5 de 5 estrelas (313)
219 048 utilizadores

ColorfulTabs Reinício necessário

The first addon you should be installing on a fresh Firefox install. A must have. The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color.

Avaliado em 4 de 5 estrelas (1 019)
211 810 utilizadores

VKontakte.ru Downloader (music/videos/photos @ VK) Reinício necessário

Download music, videos and photos from VK.com / vkontakte.ru. One-click download, natural filenames, displaying file size and bitrate for music, downloading HD video, downloading HQ photos. No spam, no usage of your account, no spyware.

Avaliado em 4 de 5 estrelas (558)
206 625 utilizadores

MinimizeToTray revived Reinício necessário

Minimizes windows into the system tray.

Avaliado em 5 de 5 estrelas (332)
190 832 utilizadores

SQLite Manager Reinício necessário

Manage any SQLite database on your computer.

Avaliado em 4 de 5 estrelas (60)
174 370 utilizadores

LookOut Reinício necessário

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

Avaliado em 4 de 5 estrelas (150)
164 889 utilizadores

µBlock

NOTE: Users should be aware that this add-on represents an older fork. The original developer of uBlock is continuing to actively develop the newer fork uBlock Origin.

Avaliado em 4 de 5 estrelas (225)
159 863 utilizadores

SaveFrom.net helper all-in-1 / youtube downloader

SaveFrom.net helper will enable you to download files from YouTube.com, FaceBook.com, Vimeo.com, Daylimotion.com, VK.com, Odnoklassnoki.ru, Soundcloud.com and more than 40 other just in one click.

Avaliado em 4 de 5 estrelas (248)
157 808 utilizadores