Waterfoxを使った時に見れないページの回避が可能で、重宝しています。

信任

Exactly what I was looking for. I use it to randomise my UA every 5 minutes for various desktop browsers to help prevent fingerprinting and tracking. I had to disable IE11 from the list since that gives errors on quite a few sites now about it being unsupported. Other than that, works perfectly.