About this Collection
69 Add-ons in this Collection
CSS Reloader is an extension that allows you to reload all the CSS of any site without you have to reload the page itself.
The legacy Test Pilot program has been replaced, and this add-on is no longer useful. If you're interested in testing new features in Firefox please join the new program at https://testpilot.firefox.com
Manage your stylish userstyles right from the developer tools.
Measurer allows to measure dimensions of the objects on html page. Press down shift for multiple measurements.
Developer Assistant by Ted Mielczarek, Gavin Sharp, others
A suite of tools for developers.
View xml data in textareas, in readable format.
Good Website Inspector is an extended ruleset for YSLOW, a Firefox AddOn, to check source codes of HTML pages to get easy and fast hints to optimize the current page.
A Regular Expression testing tool
Allow RegExp developer to test the regular expression on the live HTML content. Useful for those who work on crawling website data.
The main goal allows users to open (and in some cases edit) page source with external applications.