tilu Mozilla Firefox Collection is a utility developed by Utilu that contains multiple versions of the free web browser Mozilla Firefox, which are standalone so they can be used at the same time. This is useful for web developers to see how your websites look when rendered using different versions of the Gecko render engine.
When you install the application, it asks which all versions of Firefox needs to be installed. It also supports Firefox and Web developer add-on. You can also specify the filenames or locations (URLs) to open in all installed versions, which means the specified URL will be opened in all versions of Firefox simultaneously.
Utilu Mozilla Firefox Collection installs; Mozilla Firefox 2.0.x / 3.0.x / 3.5.x / 3.6.x / 4.0.x
Mozilla Firefox add-ons and plug-ins Firebug 1.7.x add-on Web Developer 1.1.9 add-on Flash Player 10.2.x plug-in