Good question. I've just tested on the latest ESR version of Firefox (115.27.0esr) and the bypass definitely works there.

I've also been able to do more testing on whether the XHR/frame blocking is bypassed, and I was wrong there - XHR and frames are blocked perfectly fine, even with this bypass. I haven't tested cookies and media blocking, but so far it appears like it might just be scripting that gets through.

I'll send gorhill an email, thank you for the suggestion!