Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Reinstates the extensions.checkCompatibility preference without respect to the current application version.
Permanently hide content from web pages using the Context Menu. Simply, click and "Remove it Permanently". Now includes previewing of items before removal, support for IFrame as well as lots of advanced features to make it easy for...
Change the colors of web sites. With the move of some sliders, you change the foreground and background colors of a site.
Watch the video for a short introduction.
The Web. Displayed Your Way.
Click to zap away rubbish.
Hack out the noise, read, print in peace.
* Widen Elements & Text.
* Save the changes to Stylish.
* Remove Sidebars & Ads.
* Black on White.
User empowerment (bsd on aardvark)
Reclaims the browsing space by transforming Firefox 4's wide grey add-on bar into a neat set of buttons.
Colorize entire web pages by means of advanced controls for hue, saturation, lightness and opacity. White-list web domains for automatic colorization.
Resize and position Firefox with keys: ALT+1, 2, 3, 4, 5, 6, 7, 8, 9 and 0.
(NumExt is NO LONGER MAINTAINED since April 2010)
NumExt numbers your tabs with no limitation on how many tabs you can open.
For more info in the Description... or visit
Multiple Addon Deactivator (M.A.D) is an addon that can (de)activate one, many or each addon at the same time
Cool utility for cleaning up a page (for printing or better viewing) as well as for web development. Displays a red rectangle on the element under the mouse -- hit "w" to go wider (get the containing element), then hit other keystrokes to remove, etc
This addon enhances all the tooltips in Firefox. DOWNLOAD the new Firefox 4.0-compatible version there: https://addons.mozilla.org/firefox/addon/7314/contribute/roadblock/?src=version-history&version=3.0.20110409 :)