Firefox

I'm not trying to be combative, just wondering what the policy would look like.

A changelog is a changelog

Sure, and I would expect to see the Safari changelog when I launch Safari. But I get it when I upgrade my OS, and Safari (in my eyes) isn't an OS feature. I don't use Safari, so seeing Safari changelog is an ad. Likewise for Edge on Windows, I don't use Edge, so seeing an Edge changelog from an OS update is an ad (not sure if MS still does that, I haven't used Windows in years).

Google advertises its products on its search page. Microsoft advertises its products on its OS (initial run, pretty much every update). Apple does the same with macOS.

So what exactly is the proposed change? Do we block advertising for other products if you have a certain share of the market? Or does it come down to the manner of advertising?

In my mind, "monopolistic behavior" means doing something to undermine competition. If you're merely pushing your own services and not interfering with other options, I don't think that's anti-competitive. For example, is Valve's pushing of its Steam Deck on their store anti-competitive? Valve is dominant on the PC gaming market and I wouldn't be surprised if they're dominant in handheld PC gaming as well (e.g. compare to Ayaneo, Asus ROG Ally, etc). That sounds similar to how Google is dominant in both search and browser market share. I don't think Valve should be treated as a monopoly though since they're not really doing monopoly things (no exclusives except a handful of Valve-made titles, no special discount for using Steam Deck, etc).

I get it, Google is bad, but what exactly are they doing that's bad that should be restricted? What exactly should the law look like? We can't punish companies because we feel they're doing bad things, we need a system of laws that specifically lays out what's not okay. AFAIK, Google doesn't meet the current standard, so what exactly should that standard be?