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colorPicker No Restart

A very simple extension for learning web page colors. Copy the RGB or Hex color code of any pixel displayed in your browser to the clipboard (in CSS/HTML format). Similar in function to Internet Explorer's color picker.

Rated 4 out of 5 stars (29)
4,118 weekly downloads

The Fox, Only Better No Restart Featured

Australis, the new Firefox theme, made a great browser look awesome. And now it will also feel awesome using it!

Rated 5 out of 5 stars (237)
3,970 weekly downloads

Turn Off the Lights

The entire page will be fading to dark, so you can watch the video as if you were in the cinema.

Rated 5 out of 5 stars (255)
3,883 weekly downloads

Updated Ad Blocker for Firefox 11+

It blocks ads on the web pages you visit including Youtube, Hulu, TwitchTV/JustinTV, most Major News Sites(cnn/fox/nbc/msnbc) and many more. Ads from services like Google AdSense Yahoo DoubleClick It also blocks the GoogleAnalytics tracking script.

Rated 3 out of 5 stars (50)
3,474 weekly downloads

SearchPreview

The extension previously known as GooglePreview. Inserts preview images (thumbnails) and popularity ranks of web sites into the Google, Yahoo, Bing and DuckDuckGo search results pages.

Rated 4 out of 5 stars (390)
3,323 weekly downloads

Zoom Page

Full featured zoom manager with independent page and image zoom modes. Choose from four zoom modes: Default Zoom, Fit-To-Width, Default Zoom + Site Specific or Fit-To-Width + Site Specific. Button style and zoom levels are fully configurable.

Rated 4 out of 5 stars (130)
3,311 weekly downloads

Status-4-Evar

Status bar widgets and progress indicators for Firefox 4+

Rated 5 out of 5 stars (536)
3,273 weekly downloads

Classic Toolbar Buttons No Restart Featured

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.

Beta builds on versions page!

Rated 5 out of 5 stars (144)
2,863 weekly downloads

Just Disable Stuff No Restart

Just disable JavaScript - toggle it on and off. No fancy toolbars, icons, windows, unnecessary functions. Just do it. You can also disable images. And CSS. And multimedia. Just like that. If You're night owl, Your eyes will love Night Mode.

Rated 4 out of 5 stars (12)
2,860 weekly downloads

Modern Download Manager

Modern Download Manager add-on gives you total control over every aspect of your downloads and modern design.

Rated 5 out of 5 stars (19)
2,822 weekly downloads

Roomy Bookmarks Toolbar

Make your bookmarks bar better. Roomy Bookmarks Toolbar can: hide bookmarks/folders name(dock like), multirow, autohide and many another features(more than 20).
Customize your bookmarks bar using one add-on.

Rated 4 out of 5 stars (234)
2,538 weekly downloads

Flash Gestures No Restart

Use your favorite mouse gesture add-on and Firefox hotkeys on plugins like Flash Player.

Rated 5 out of 5 stars (17)
2,437 weekly downloads

Tile Tabs

Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.

Rated 5 out of 5 stars (229)
2,367 weekly downloads

I don't care about cookies No Restart

Get rid of annoying cookie warnings from tens of thousands of 'infected' websites!

Rated 5 out of 5 stars (28)
2,297 weekly downloads

Night Mode Pro No Restart

Switch to night mode and the display is much easier on the eyes!

Rated 4 out of 5 stars (6)
2,188 weekly downloads

Dark YouTube Theme No Restart

Shut down the lights on YouTube.
Enjoy!

Rated 4 out of 5 stars (25)
2,082 weekly downloads

FindBar Tweak No Restart Featured

Between simple tweaks such as placing the findbar in the top corner, to the powerful "Find in All Tabs" tool, it has everything to make the Find Toolbar a powerful and accessible research tool!

Rated 5 out of 5 stars (216)
1,957 weekly downloads

HTitle

Hide title bar if window is maximized.

This extension created only for GNOME 3. It can create problems with another DE (KDE, XFCE, etc). However, you can use HTitle at your own risk (need enable "legacy" mode on settings page).

Rated 5 out of 5 stars (88)
1,948 weekly downloads

Text Link

Allows URI texts written in webpages to be loaded by double clicks.

Rated 4 out of 5 stars (289)
1,898 weekly downloads

Vimperator

Make Firefox look and behave like Vim

Rated 5 out of 5 stars (176)
1,868 weekly downloads