Add-ons
Developer Tools
by Zulkarnain K.
About this Collection
Add-ons for web development and extension development.
19 Add-ons in this Collection
SQLite Manager
Live HTTP Headers
by Daniel Savard, Nikolas Co
36 users
View HTTP headers of a page and while browsing.
HttpFox
Remote XUL Manager
by Jorge Villalobos
11 users
Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.
JavaScript Debugger
by James Ross, Robert Ginda, others
882 users
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.
DOM Inspector
by SeaMonkey Council
13,017 users
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.
about:addons-memory
by Nils Maier
7 users
Adds an about:addons-memory page that details add-on memory usage
Execute JS
by Rudolf Noe
0 users
Execute JS is a enhanced JavaScript-Console, where you can comfortably enter and execute arbitrary JavaScript-Code and modify functions...
Key Manager
by Subrata Mazumdar
0 users
KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation
Markdown Viewer
by Thiht
2 users
Markdown document viewer.
Allows to visualize formatted markdown documents in browser.
Extension Auto-Installer
by Wladimir Palant
5 users
Important note: This extension will not work in Firefox 57 and above. Providing this functionality in Firefox is no longer possible, the extension is discontinued.
Developer Assistant
InspectorWidget
by Sailfish
5 users
Adds toolbar button and context menus for invoking the DOM Inspector (DOMi) for either chrome or content elements.
JavaScript Object Examiner
by Chuck_Baker
0 users
Display JavaScript object methods and properties for any available scope.
Extension Test
by Kris Maglione
0 users
A simple add-on for extension testers, especially AMO editors and developers who plan to submit their add-ons to AMO.
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