Add-on is the Mozilla term for software modules that can be added to the Firefox web browser and related applications. There are three types: extensions, themes, and plug-ins. Mozilla hosts them on its official add-on website.
Firefox 4 eliminates the status bar from the bottom of the browser window in favor of a new toolbar located at the bottom of the window. This new toolbar, with the ID "addon-bar", is a standard XUL
10 essential Firefox add-ons for designers | Creative Bloq
Add-on is the Mozilla term for software modules that can be added to the Firefox web browser and related applications. There are three types: extensions, themes, and plug-ins. Mozilla hosts them on its official add-on website.
10 essential Firefox add-ons for designers | Creative Bloq
Welcome to SeaMonkey Add-ons. Add extra features and styles to make SeaMonkey your own. Close. AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages. ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON! by Wind Li, wOxxOm.