Rated 5 out of 5 stars

PERCE-NEIGE কর্তৃক জুলাই 10, 2017 তারিখে · permalink

It allows to install incompatible addon. You can do it though the about:config, but this extension is genious. Why is it genious? Because Firefox keep changing the about:config parameter each time it updates, and ask to enter the current version, so no more headache with this.