i believe @kez has just fixed that specific issue.
that said, I can reproduce the problem in my own Firefox, but I have rather stringent privacy controls. specifically, i can reproduce the issue with “Third-party cookies” enabled. The symptom is that the “Donate” button doesn’t work when clicked. At the top of the dev console, we also see:
Request to access cookie or storage on “<URL>” was blocked because we are blocking all third-party storage access requests and content blocking is enabled
This blocks requests to stripe and paypal.
I think what is happening is that we’re relying on a third-party cookie, and this is blocked by many browsers, including newer browsers (I’ve seen a few Firefox 94 here, for example). Preliminary reports indicate that privacy badger will also block those cookies.
So; a workaround is to enable third-party cookies and/or disable privacy badger, as relevant. See also the upstream docs.
We’re working on a fix to correct the cross-origin errors on our side.
Thanks again everyone for the detailed reports, extremely useful.