Interesting that you talk about standards because I think the alt browsers are not judged to the same standards as chrome. Brave injected affiliate links. Microsoft edge injected ads on random third party sites, now it’s Mozilla. You won’t see google doing these type of (shady) things. You won’t get explicit stuff from google injected into properties they don’t own without explicit permission from the site owners.
Imagine if google injected random stuff without permission in a site like ycombinator, people would go absolutely nuts and google would be considered diabolic, yet for some reason all other browsers have done similar stuff and they somehow get a pass?