It really wouldn't let me open a Google Photos shared album in Firefox Android[0], always going to the Photos app. I am certain it never asked me before.

[0] which I needed to share the link to my laptop, as Google Photos only gives you a "copy link" option for a shared album, not actually sharing it. I am SO fed up with this shit, programs fighting to keep me "in the ecosystem" while sacrificing UX and just blocking you from completing a task.