To be honest, I think uBo almost become a cult (which is nothing wrong, to be clear). It has lots of very opinionated development progress happened/happening to it, and most of them are irrelevant for majority of users (even the "power" users). And if I dare to say, it's at the cost of its UX.

For example, a few years ago, uBo disabled the ability to "greenlight" a domain (i.e. adding a whitelist dynamic rule) by simply clicking in the (advanced) popup. The official reason is that it's the most misused features, which is true, but it makes legitimate use of it (to whitelist a 3rd-party domain for a specific site because otherwise the site is broken) very inconvenient.

And if you ask about it, they (people in related forums like reddit) tell you "well you should never use it. NOOP should be sufficient. If not, the rules are wrong and you should report to the rule author(s)." This is cool but it didn't solve my immediate problem that a site I want to visit is broken by uBo.

I learned later, again from uBo subreddit, that you can double press ctrl to temporarily enable this feature back -- which is more than enough for me -- but how the hell do you even discover this?

And I never remembered what the two columns for adding dynamic rules are supposed to be -- since there is no headers.

I spent a year trying to use Firefox after being a chrome user for well over a decade - I eventually switched back when Mozilla started adding the same tracking features that chrome started out with years ago. Mozilla seems to be going down the same path, albeit several years behind and slowly. After that I just didn’t see a reason to not just use chrome if I’m going to have to neuter tracking bullshit anyway since it’s still much more performant than Firefox.

V3 complaint UB exists (UBo Lite) and works plenty fine save for what even I (as a power user) would call power user features. It’s very annoying that Google is going down this route, and I really want Firefox to be the better browser, but I just don’t think it is yet. During my year of usage you definitely can notice the performance difference and the inconsistency in certain webpages.