Probably referring to the Documentation link you provide on the GitHub page, and it breaks back button for me too.

I just tried that on several browsers; Safari and Chrome are fine, it seems to be only Firefox that has a problem with that. I have no idea whether that's a bug in Firefox or Github, and either way there's nothing I can do about it, sorry.

Hmm... weird. I guess this should either be reported to the GitHub people and/or the Firefox people?

I guess he should have said that there's nothing reasonable he can do about it. Creating an entirely separate set of HTML pages would require a new publishing flow, add a new step every time docs update, and generally encourage the docs to fall out of sync with the repo. He could do all of this, or he could do the sensible thing and leave the docs exactly like they are.

I think it's the htmlpreview: the back throws you into a redirection to the current page.