If websites don’t work on Firefox even if the user agent was changed to Chrome I recommend you to use a privacy preserving browser like ungoogled chromium.
Easiest would be to install a plugin such as “User-Agent Switcher.” This is the string of text that identifies what browser, version, and platform you’re running to the server you’re accessing.
When I was choosing a return site it kept saying, “oops there was a mistake. It was not your fault. Try again later”.
Their mobile app sucked too, so I installed chrome to see if it would work and it did right away.
If websites don’t work on Firefox even if the user agent was changed to Chrome I recommend you to use a privacy preserving browser like ungoogled chromium.
Or find another service.
Bit hard to do that with government websites and stuff like that.
How would I change the user agent? Never heard of this before, what is it?
Easiest would be to install a plugin such as “User-Agent Switcher.” This is the string of text that identifies what browser, version, and platform you’re running to the server you’re accessing.
This is the way I do it when necessary.