You are really underestimating the complexity of the task of building a web engine.
Another problem is that Chrome is already ubiquitous and most of the web sites are simply ignoring the Gecko and only optimise against Chromium.
Don't get me wrong, I truly wish we had more completion and I hope those projects take off and with time become a viable alternative of Chromium but I am somehow doubtful.
What are you going to use this GPU for. Simply for playing and you don't care about ray tracing AMD is king. Or if you find a deal on Intel.
Self hosting LLMs and hobby AI/ML projects, NVIDIA.
Blender - NVIDIA
Internet Streaming - NVIDIA
Video editing - NVIDIA
Plex/Jellyfin - Intel
Unfortunately in most cases NVIDIA is still the king.
Check this link that will give you some ideas about the different GPUs: https://www.tomshardware.com/reviews/best-gpus,4380.html