MozBackup is a simple utility for creating backups of Mozilla Firefox, Mozilla Thunderbird, Mozilla Sunbird, Flock, SeaMonkey, Mozilla Suite, Spicebird, Songbird and Netscape profiles.
Seoquake is a Mozilla Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization(SEO) and internet promotion of web sites. Seoquake allows to obtain and investigate many important SEO parameters of the internet...
* jQuery expressions are intelligently presented in Firebug Console and DOM inspector
* attached jQuery data are first class citizens
* elements in jQuery collections are highlighted on hover
* jQuerify: enables you to inject jQuery into any page
Firefinder is an add-on to Firebug, to help find HTML elements matching chosen CSS selector(s) or XPath expression. Type in desired filter and view the results.