Limits

Limit Value What happens
Open tabs 50 Opening another closes the oldest tab.
Closed tabs you can reopen 20 Ctrl Shift T reopens the last one (Cmd on macOS).
Guests in a shared session 8 A ninth guest sees "This session is full."
File guests can edit 2 MiB Larger files are view only for guests. Files over 100 MiB are not shared.

Version history

Every saved copy is kept for 7 days, then the last copy of each day for up to 30 days. Copies saved within 5 minutes of each other merge into one. Named copies, and the newest copy of each file, stay until you delete them.

Files over 1 MB get no copies. History uses up to 300 MB, and the oldest copies go first.