Old versionsSee all
Utilu Mozilla Firefox Collection contains multiple standalone versions of Mozilla Firefox, which can be used at the same time. It is useful for web developers to test websites, apps, and pug-ins. In Utilu Mozilla Firefox Collection you can quickly see how your websites look when rendered using different versions of the Gecko render engine. You can specify the filenames or locations (URLs) to open in multiple installed versions of Mozilla Firefox. Also the versions to open can be chosen.