Hello, Wim. Couldn't find a bug report page, so I'm posting it here.
There's a bug with Regex's Lookahead/Lookbehind where it mixes up colors of the highlighted words if a pattern containing Lookahead/Lookbehind was found (at least that's how I think it works).
To reproduce this you need to create three lists and color them red, green and blue. Then add to each list one of these patterns: "r(?=[a-z])", g(?=[a-z]), b(?=[a-z]). Then reload a page and see that a lot of the highlighted letters don't match their colors. It will also mix up the colors of patterns not containing Lookahead/Lookbehind if you add those as well.
A couple of requests: could you please make the list of word lists slimmer? I usually make a bunch of differently color-coded lists for websites, and sometimes it requires some amount of scrolling to get to the list I need. Also, notifications that the list is limited to certain websites are unnecessary because, you know, every list should have those. Also, case-insensitive sorting method for lists and words would be appreciated.
Other than that, it's a "Must Have" add-on, greatly improved my browsing experience!