Make the copy before you need it
Open Watchlist and choose Create backup. Copy the complete text into a note or document you control. It contains supported title identifiers and checkpoints, not video, passwords or an account login. Keep a new copy after making important changes to the list.
Merge into another browser
Open Noxx's Watchlist there, paste the complete text into Restore backup and choose Merge backup. Valid saved titles are added. Existing checkpoints in that browser are preserved rather than silently replaced. Read the result message before assuming the transfer succeeded.
If the text is rejected
Check that the beginning and end were copied together and that the backup belongs to Noxx. Do not combine fragments from different brands or edit identifiers by hand. Without a prior backup, a cleared browser list cannot be recovered through an account here. The simplest protection is a copy made while the list is still available.