Rated 5 out of 5 stars

Από τον/την PERCE-NEIGE στις Ιούλ. 10, 2017 · μόνιμος σύνδεσμος

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.