Sort of continuing from https://support.mozilla.org/en-US/questions/1423702 Now trying 139.0.2 on a old laptop the subfolders are not mixed in the root anymore, but when opening TB, the subfolders are only partially listed. The listing changes every time. TB then creates/downloads the missing ones/the subfolder structure but then leaves them all displayed as open/uncollapsed, which is a massive folder tree to navigate down. Takes ages and is a total pita. We could even live with being able to collapse all the folders in one action, but there is no command for that. I read elsewhere it may be a problem with OAuth so changed to app password, no difference. Maybe it's the very large quantity of subfolders... I note that the profile folder is the same size when TB is opened or closed....indicates that TB has the folders downloaded but needs to sync to display them?? No idea really. But, we've been avoiding updating for a year and a half, need a solution or another client. Thanks for any help.