Hello! I just tried the following alternative instances with success on the official desktop FF (v72.0.2). Please note the instance change feature is pretty basic with no validation so if a mistake is made it just won't work, so please make sure you have entered them exactly as is shown here:

- https://nitter.snopyta.org
- https://invidious.snopyta.org
- https://bibliogram.snopyta.org

Note there is no trailing forward slash and the protocol is also included. Let me know if you are still experiencing a problem after confirming this and I'll look into it further.

** EDIT ** Basic instance input validation is now included in v1.1.6 which should address this problem.
** EDIT 2 ** v1.1.7 now displays a list of possible instances as you type.