I can confirm this. Pages you bookmarked in reader view were saved offline. I us...

niea_11 on Nov 11, 2020 | parent | context | favorite | on: Show HN: Self-hosted offline Internet from your br...

I can confirm this. Pages you bookmarked in reader view were saved offline.

I use firefox nightly on android and the feature disappeared (I think) sometime this year when they re-did the whole ui. I can't find an article or bug ticket explaining the reason why.