124 613 uživatelů
Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.
152 480 uživatelů
Allows the download manager to also open in a tab or sidebar, and adds some optional display changes.
92 850 uživatelů
Adds the ability to create and edit entries in the password manager.
64 936 uživatelů
88 441 uživatelů
The greatest user script engine on the Internet (a fork of Greasemonkey).
123 218 uživatelů
Make any pages' search functionality available in the Search Bar (or "search box")...
80 672 uživatelů
Save an image of a web page (including Flash content) to a file. Web page screenshots may be captured interactively or from the command line. Options allow you to control the output format (PNG or JPEG), image file name, scaling, and much more.
93 816 uživatelů
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon
For Firefox 23+, you need 0.958 (under review)
100 815 uživatelů
Control what gets sent as the HTTP Referer on a per-site basis.
29 359 uživatelů
Adds an about:addons-memory page that details add-on memory usage
60 257 uživatelů
Cookie Monster provides proactive cookie management on a site or domain level basis, including 3rd party cookies. Via the status bar, it provides easy access to enhanced cookie functionality, while doing so in a non-intrusive manner.