Portable Bookmarks

I’d like to be able to store my bookmarks on a external drive/USB or via ProtonDrive/OneDrive/Dropbox/Box and access my bookmarks live from the bookmarks file stored on my USB or cloud service.

Syncing keeps the bookmarks between workstations synced but I don’t want to import my bookmarks or sync them, I would like to use the bookmarks and purge them from the browser whenever I remove the USB and restart the browser.

If this feature already exists and I am just not aware of it, any help would be appreciated. Thank you!