If it was working correctly though. On the desktop version it seems to be working almost flawlessly, but on mobile it requires an internet connection when you're reopening a tab in reader-view mode which is a bit odd. I'm starting to thing this is probably due to the existence of pocket integration (there's an old bug report).

And the fact that we are connected 99.9% of the time doesn't make it less annoying on the next flight (whenever that will be in this pandemic :)).