Save while you browse
Use the heart on a poster or Save to My List on a title page. Saved titles remain in this browser. For a series, choose the last completed episode on its details page and save a checkpoint as well.
Copy before changing devices
Open My List and select Create backup. Copy all of the text in Your backup into a private note. On the other browser, open this same site, paste the text into Restore backup and choose Merge backup.
What merging does
Recognized missing titles are added. Valid checkpoints are added only when there is not already a checkpoint for that title in the destination browser. Duplicate entries are not repeated. Unrecognized titles or invalid episode numbers are skipped instead of becoming broken cards.
If the list disappears
Check your browser profile and whether you used a private window. Clearing site storage can remove the list. Restore a backup if you have one. Recently browsed is a separate history of opened title pages, not proof that you watched those titles.