If this isn't a targetted advert in my browser, I don't know what is.
And here's where you turn it off:
That's good news as far as I'm concerned. I've got WebGL disabled in Firefox now. Frankly, if a website needs direct access to my GPU to run, I don't need that website.
What does add-on support look like? The baseline privacy looks (very) good, but I think I'd still like things like umatrix to block unnecessary or unwanted resource requests and to prevent running any extraneous javascript etc. An ad-blocker like ublock origin goes without saying. I refuse to access the WWW without one.
If that ever becomes impossible, I'll switch to Gemini exclusively :)