Please read the following posts :-
1 - https://utopian.io/utopian-io/@ah-2002/bug-hunting-contribution-add-contribution-button-on-the-top-is-not-working
2 - https://utopian.io/utopian-io/@manishmike10/contribution-button-not-working-bug-on-utopian-io
This is the fix to both :- https://utopian.io/utopian-io/@mooncryption/added-bug-fix-for-firefox-contribution-button-utopian
But i can still reproduce the bug, It seems the mooncryption forgot to merge the commit from new-design branch
OS and browser:-
Ubuntu, 57.0.4 firefox quantum (64 bit)
This is not a duplicate post, its a reminder post. this bug hinders users from using utopian.io in firefox thats why i think it is critical and should be posted as a bug.