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HTTPS Everywhere

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 (78)
186.871 utilizadores

Mozilla Archive Format, with MHT and Faithful Save

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

Avaliado em 4 de 5 estrelas (294)
170.071 utilizadores

Enigmail Em destaque

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Avaliado em 4 de 5 estrelas (188)
160.960 utilizadores

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

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 (221)
159.826 utilizadores

Live HTTP Headers

View HTTP headers of a page and while browsing.

Avaliado em 4 de 5 estrelas (168)
153.516 utilizadores

Image Zoom

Adds zoom and rotation functionality for images...

Avaliado em 4 de 5 estrelas (338)
151.026 utilizadores

Screengrab (fix version)

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Avaliado em 5 de 5 estrelas (286)
140.632 utilizadores

ChatZilla

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

Avaliado em 4 de 5 estrelas (126)
134.026 utilizadores

Bluhell Firewall Sem reínicio

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Avaliado em 5 de 5 estrelas (275)
130.120 utilizadores

DOM Inspector

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Avaliado em 5 de 5 estrelas (66)
127.006 utilizadores

Youtube MP3 Podcaster

Self contained add-on for downloading youtube videos to mp3 for easy listening on podcasting gadgets like a Zune or iPod

Avaliado em 4 de 5 estrelas (227)
123.581 utilizadores

Youtube Best Video Downloader 2 - MP3 MP4 M4A AAC Sem reínicio

Now with 1080p Full-HD Support!
Direct YouTube downloads MP3 M4A AAC and HD MP4, FLV, 3GP. With just one mouse click! With the click off an mouse button! Super fast downloads right from the Youtube video page you are viewing.

Avaliado em 3 de 5 estrelas (42)
121.650 utilizadores

Lucifox

Read EPUB e-books and browse OPDS catalogs.

Avaliado em 4 de 5 estrelas (21)
121.317 utilizadores

Toolbar Buttons Sem reínicio

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

Avaliado em 4 de 5 estrelas (322)
120.906 utilizadores

Thumbnail Zoom Plus

Shows full image when you hover over a thumbnail. Works with Amazon, Baidu Images, Bing Images, Facebook, Flickr, Google+, Google Images, IMDb, LinkedIn, Netflix, Pinterest, Reddit, Twitter, Yandex, YouTube, Wikipedia, Yahoo Images, & many more.

Avaliado em 4 de 5 estrelas (347)
115.494 utilizadores

JavaScript Debugger

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Avaliado em 4 de 5 estrelas (50)
114.549 utilizadores

X-notifier (for Gmail,Hotmail,Yahoo,AOL ...)

Notifier for gmail, yahoo, hotmail, aol and more webmails.
X-notifier(aka WebMail Notifier) checks your webmail accounts and notifies the number of unread emails...
Supports : gmail, yahoo, hotmail, POP3/IMAP, facebook, twitter and more

Avaliado em 4 de 5 estrelas (1.676)
99.526 utilizadores

Theme Font & Size Changer Sem reínicio

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Avaliado em 5 de 5 estrelas (170)
98.262 utilizadores

RequestPolicy

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Avaliado em 4 de 5 estrelas (229)
95.287 utilizadores

IE Tab +

Uma versão melhorada do IE Tab que permite usar o motor do IE dentro do Mozilla/Firefox.

Avaliado em 3 de 5 estrelas (86)
95.045 utilizadores