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about:addons-memory

Adds an about:addons-memory page that details add-on memory usage

Rated 4 out of 5 stars (137)
17,652 users

about:addons-memory 2016

Adds a new page that shows add-on memory usage

Rated 5 out of 5 stars (37)
9,663 users

about:media

Adds an about:media page that provides debugging information about media elements in Firefox.

Not yet rated
83 users

Access IranianUK in Iran Requires Restart

Bypasses the iranianuk.com filter in Iran.

Rated 5 out of 5 stars (2)
533 users

Access Me Requires Restart

Access vulnerabilities in an application can allow an attacker to access resources without being authenticated. Access-Me is a Firefox extension used to test for Access vulnerabilities.

Rated 4 out of 5 stars (3)
68 users

Access online for SeaMonkey Compatible with Firefox 57+

This extension is the SeaMonkey online

Rated 4 out of 5 stars (3)
68 users

Accessibar Requires Restart

Accessibility toolbar enabling easy manipulation of web page display and text-to-speech output...

Rated 3 out of 5 stars (59)
19 users

Accessibility Evaluation Toolbar Requires Restart

Support web developers in testing web resources for accessibility features.

Rated 4 out of 5 stars (16)
2,629 users

Accessibility Scripts Toolbar Requires Restart

A toolbar containing scripts to improve the usability and accessibility of any given webpage for blind computer users by providing functionality to solve commonly encountered problems caused by bad web design practices.

Not yet rated
1 user

Accessibility Testing Tool Firebug (discontinued)

This tool is no longer being supported or developed, not recommended.

Not yet rated
57 users

AccessTab ver.1.0

Web Accessibility of all linked webpages for a browsing page can be evaluated by toggling through their hyperlinks with the TAB key without the need to open them. It will report the number of errors as a star scale according the W3C WCAG checkpoints.

Not yet rated
3 users

AccessTimesPanel

See the current time on the development panel!

Not yet rated
1 user

ACColorPicker

A full featured color selector tool, to work with colors, and easily find the colors you want.
很方便色取色器,可以页面上直接取色,然后再对颜色进行进一步的调整

Not yet rated
202 users

Ace Script Requires Restart

User Script Manager with the support of Ace Stream technologies

Rated 2 out of 5 stars (8)
5,584 users

Acebug Requires Restart

Syntax highlighting for the Firebug command line using Ace.
Fuzzy auto completion
and more...

Rated 4 out of 5 stars (19)
349 users

Active Whois plugin for Firefox Requires Restart

Starting Active Whois to get details about any Web site owner and its host server...

Rated 2 out of 5 stars (12)
176 users

Activity Manager [Beta] Compatible with Firefox 57+

This add-on shows the history of websites you have visited over the past 24 hours and the number of times you have visited it. Also warn you regarding excessive usage of a website by notifications which can be set in the Preferences Section

Not yet rated
5 users

Ad Hacker Requires Restart

Ad Hacker shows you which advertisers and publishers are following you around the Internet. Developers can see details about Javascripts, beacons, and other web bugs. Write your own rules for finding bugs in XML, or visit http://rules.adhacker.com/

Rated 4 out of 5 stars (12)
50 users

Add N Edit Cookies Requires Restart

Cookie Editor that allows you add and edit "session" and saved...
Firefox 3 comptible

Rated 4 out of 5 stars (72)
198 users

Add N Edit Cookies Requires Restart

Cookie Editor that allows you add and edit session and saved cookies

Rated 4 out of 5 stars (18)
277 users