Sorry to rate with one star but I'm trying to install it on my mobile phone and its says that its not possible to download because the file is corrupted and to verify my connection...No problem installing other extensions. Any ideas? I've restart the phone, clear cache, clear data from Firefox and problem remains.
Now with the version 66.05 it's working fine. Tks! I had version 66.02 and in Google play said it was updated.. I needed to install it manually.