Comment 3 for bug 2065411

According to seb128, upstream was working on a solution to this via portals a while back[1], but I don't know about its current status; so I'll try following up with them to see if they may have any updates about it.

[1] https://forum.snapcraft.io/t/making-it-easier-to-migrate-data-from-other-browsers-into-firefox/36721/4