Please all stop getting off-topic. Let’s not start this silly off-topic discussion about “What is the best browser” or “I use this browser, because…”. And talking about what is “current” is ridiculous.
I’ve reported these posts as off-topic, maybe they can be split or so.
This thread here is, by it’s title, about H264 and other codecs that e.g. do have problems in the Fedora Flatpak Firefox.