Create your copy
Open My List and choose Create backup. Copy all the text from the output field and keep it in a note or document. It contains saved title identifiers and manual series checkpoints, not passwords, account details or downloaded videos.
Merge in another browser
Open My List in the destination browser. Paste the complete text into Restore backup, then choose Merge backup. Compatible title entries are added without duplicating existing favourites. Existing destination checkpoints are kept rather than overwritten.
Read the result
The message reports added titles, added checkpoints and entries that could not be used. Invalid, unknown or out-of-range items are skipped or rejected. A malformed backup is not a reason to wipe the existing list and start again.
What this cannot restore
A backup cannot retrieve another website’s account, reconstruct a lost list you never copied or import a video service’s automatic playback history. Keep a current copy if you plan to clear browser data or change devices.
Saving a series and recording an episode remain separate choices. After restoring, open a series page to confirm that the reminder matches the episode you actually completed.