Rated 4 out of 5 stars

le I_am_a_Landstander ar Márta 4, 2016 · buan-nasc

Lets you install addons marked as incompatible. This is great if you have a non-standard browser (like Pale Moon).
I would like to see an option to disable the incompatibility warnings in the Add-on Manager and even allow you to automatically check and install updates in the Manager. Still, it works.