the big issue with this setup is that most streaming platforms won’t give you multi-channel audio via the browser on Linux systems. Some might also limit the video quality.
On Windows, it used to be different, but lately I’ve observed the same—ex: Netflix seems to limit the streaming quality even with Edge.
If you really care about fidelity you’d skip the streaming and either have a collection of new and used blurays, rip blu rays from the library, or pirate bluray rips from other people.
No one offers actual fidelity on the streaming platforms. They consider cost to them to serve content and assume you don’t care enough to seek alternatives.