For something simple like this that doesn't really need to be on all the time I've started leaning back towards bookmarklets over extensions. The code is usually simple enough to actually audit, it only runs when you click the bookmarklet, and it doesn't update underneath you without warning.
A few months back someone shared several bookmarklets that they use, one of which was a simple one that disables all clipboard events on the open tab:
I run into one of these broken-clipboard situations once every few months, I can afford to spend an extra click in order to not have an extension active on every website I ever visit.
A few months back someone shared several bookmarklets that they use, one of which was a simple one that disables all clipboard events on the open tab:
https://news.ycombinator.com/item?id=38014653