I'm waiting for Firefox to start using a native context menu on macOS instead of the garbage that they are now using and which doesn't behave anything like any other context menu on macOS. It's luckily on Bugzilla, so I can keep monitoring progress daily. https://bugzilla.mozilla.org/show_bug.cgi?id=34572
There are a couple of other non-native things Firefox does that annoy me. 1. It has its own certificate system. That would be fine if it used that in addition to using the MacOS built in system, but it seems to use it exclusively. 2. It has its own spell checker, which is orders of magnitude worse than the one provided by the native MacOS spell check API. I can't think of any program I've used in the last few years o…
fwiw Chrome does this too. It's effectively standard practice for browsers - OSes routinely have very out-of-date cert stores, and don't regularly remove revoked ones. Browsers ship it separately because it's such a major security concern for browsing.