>> it might be better to authenticate with a facebook app ID and app secret instead of logging myself in personally.
I’m not sure what you mean by “authenticate with an app ID & secret instead of logging in personally?” Filling in an app ID/secret & logging in are two distinct concepts. Even if the plugin were written so that each site owner had to create their own app & configure it with the plugin by entering its ID/secret (instead of just using the FPFv2 app, which has already gone through the FB review process & can already request user_photos), someone would still have to login and grant access to their photos for it to be able to fetch them…?
>>I’d like to post photos from my group’s album and not from my personal account.
Group photos is a feature that I’d had even in the earliest versions of this plugin – until Facebook broke it, I re-implemented, and they broke it yet again. While I do eventually plan to re-add it, after the 2nd time Facebook broke it I had to cut my losses for the time being.
The next time I come round to adding new features to this plugin, that is right at the top of my list (See FAQ9: https://www.justin-klein.com/projects/facebook-photo-fetcher/#faq9)