Create your copy
Open My List and select Create backup. Copy the complete text from the backup box, including its opening and closing brackets. Keep it in a note or document you can reach from the other device.
Restore in another browser
Open My List in that browser. Paste the complete text into Restore backup and select Merge backup. Recognised titles are added once. Valid checkpoints are added only when that browser does not already have a checkpoint for the same show.
This protects newer progress from an older backup. If you want to change a retained checkpoint, open the series page and set the season and last completed episode yourself.
What the backup contains
It contains saved catalogue identifiers and series checkpoints. It does not contain movies, passwords, external service accounts or another website’s favourites. The format is specific to this 2Flix list tool.
If a restore fails
Check that you copied all the text and did not add introductory notes inside it. A backup must be smaller than 100,000 characters. Unknown titles and invalid episode entries are skipped, with the result reported. If the browser cannot save data, check its site-storage permissions.
Create a fresh backup before clearing website data or moving devices. The copy stays useful even if you later decide to keep using the original browser.