Turn the web on its head with the Plain Old Webserver (POW), which adds a server to your browser.
A plugin for Selenium-IDE to improve debugging and troubleshooting issues with scripts
Encurte seu stress. E suas URLs.
Adds the Preferences item back to the Tools Menu...
Preferences Monitor No Restart
Track your Firefox's (about:config) preferences for unwanted changes.
Prefix-Free Addon No Restart
This addon makes use of PrefixFree (http://leaverou.github.com/prefixfree/) to make any page's CSS3 work with your browser. This is especially useful when a site only uses selectors with browser prefixes not targeting your own browser.
Research the preferences listed in about:config via Google.
Shows previous page on the left side
This extension helps you to quickly find printer-friendly versions of webpages. ...
Adds a print preview toolbar button. After installing the extension, find the print preview button in the toolbar customization...
Print Preview in Firefox only available in Windows
Better Protection. Did you know that web sites use Flash to track you with Flash based cookies?
Privacy Plus will add a simple checkbox in the [Clear Recent History] dialog that will allow you to delete these cookies (Flash LSO) anytime you like.
Process Toggle No Restart
Toolbar panel from which you may restart the application with or without multiple processes, and from which you may change the maximum number of content processes. Works in Firefox 46 and newer!
The Professor X Extension let's you see inside a page's head without viewing the sourcecode...
Automatically completes profile information on other sites. Open a profile on orgbit.com, and then use the extension to complete your data on myspace, etc. Currently building our list of integrated...
prose No Restart
Provides an Edit in Prose link from a hosted file on GitHub.
Proxy Finder (IP Switcher) No Restart
Proxy Finder is an advanced proxy management tool. With Proxy Finder, you can easily change your geo-location in one click!