Add-ons
Web and Developer Tools
Sort by:
DOM Inspector
Requires Restart
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.
JavaScript Debugger
Requires Restart
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.
Zing! Locale Switcher
Want to change from one language to another? Zing! and the locale is switched.
Config Descriptions
Shows source comments for advanced application preferences in about:config
SeaMonkey Debug and QA UI
Requires Restart
Provides Additional Debug and QA UI for SeaMonkey development and testing.
SQLite Manager
UrlParams
Requires Restart
Shows you the GET and POST parameters of the current website in the sidebar...
about:addons-memory 2016
GitHub Extension Installer
User Agent Changer
Requires Restart
Adds a menu and a toolbar button to change the user agent of a browser.
View Source
Key Manager
Requires Restart
KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation
BrightSide XUL Installer
Automatically installs a set of domains to the Remote XUL whitelist.
Copy Pure Text
Requires Restart
Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.
jQuery
Relaxed the HTML Validator
Requires Restart
"Relaxed" is a HTML validator which validates HTML documents using it's own schema definitions written in Relax NG with embedded Schematron patterns.
RequestPolicy v0.5 Legacy
Requires Restart
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.
RequestPolicy
Requires Restart
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.
To create your own collections, you must have a Mozilla Add-ons account.
