If you punch in a password that's too long, or otherwise unsupported (I think?) the 'reset password' prompt seems to say 'invalid token' rather than 'your password is too long, nerd'
For example, I was trying to use a generated "list of ten words" style password, for example:
but it'd tell me my email token was wrong. After generating a few different tokens, I tried a different password that was shorter and it worked fine. Probably serverside and not browser specific, but just in case:
- Operating System: Windows 10
- Browser With Version: Firefox 72.0.1 (64-bit)
- Extensions: uBlock Origin