BT / Plusnet Router cannot change WiFi password
I'm making this post for past me and others in the future as I've just been trying to solve this for the past hour.
If you are trying to change the WiFi password of a BT Smart Hub 2 or Plusnet Smart Hub 2 (Both exact same hardware, just different colour and logo) and none of the other online solutions are working, my problem was Firefox!
After typing in the new password and clicking save, it would say the changes had been made however nothing ever changed.
I'm unsure what exactly in Firefox caused it however switching to Chrome/Edge then allowed me to change the password first try.
Not looking for any comments or help - simply writing for anyone searching for this problem in the future