After spending a good two hours or so trying to get this to work, including disabling all other add-ons and wrestling with Twitter's own limitations ("something went wrong" messages), this add-on ultimately only ever unliked one like.

A huge part of the problem is that this add-on attempts to scroll to the bottom of the page prior to working. That's not going to happen unless you have a very limited number of likes. Me? I have over 5,000 likes. Neither this add-on nor Twitter can handle scrolling through that number of likes.

This add-on probably works if you have a small list of likes, though I can't say for sure.

Please process likes from the top of the page prior to scrolling. Pretty please with ice-cream on top.