Create a copy
Open My List and choose Create backup. Copy the complete text from the backup box into a note or document you can access on the other device. Keep the entire text together rather than editing individual entries.
Merge in the other browser
Open My List there, paste the text into Restore backup and choose Merge backup. The action adds recognised saved titles and missing checkpoints. Existing checkpoints in the receiving browser stay in place. Read the result message to see what was added or skipped.
If the text is rejected
Confirm that you copied the whole backup, including its opening and closing characters. A backup from a different brand is not a Bitcine backup. Create a fresh copy from the original browser if it is still available. Invalid text should produce an error rather than erase the list you already have.
What a backup contains
It carries catalogue references and manual episode notes. It does not contain movies, external-service passwords or synchronised viewing history. Keep a recent copy before clearing browser data or replacing a device.