> I think you may be overlooking some nuance related to that extension vs my solution though. Extensions like that check every page you visit whereas my approach only checks on click so there is a much greater need for privacy solutions with extensions like that since they would normally be sending out your entire browser history in real time to the api.

I'm not overlooking; this extension doesn't do that. That's what's so cool about the Bloom filter approach: all the checks can be done locally, never revealing your interests to a third party. So if the metric is privacy, it's superior to the bookmarklet, even if it checks every page you visit in real time.

(In principle, that is. I haven't reviewed the implementation. :)