Bit long for posting in comment, but should work.
I copy pasted and adjusted some logic from my not yet released unpacked extension into a tampermonkey script. It is bare bone and misses bells and whistles, but should do the job. It even has two lists and two styles for each list. Plus import, export. But I do not really have any clue about that tampermonkey and if I am missing something crucial. And I did not test it for very long.