I apparently have the same problem as in this older thread : https://support.mozilla.org/en-US/questions/1175669 Firefox works fine for a while, but suddenly stops loading pages : the progress bar stays at the start (around 10%) until I get a "connection has timed out" error. I tried quitting the app, clearing the cache, and clearing the storage but nothing helped. The only fix I found is to reinstall Firefox... but this only works for a short while :( In the exact same conditions (phone, internet connection, vpn, etc), Firefox focus works fine.