Just having dominant marketshare, especially in the presence of easily-accessible competitors (e.g. Safari, Mozilla, Opera, etc.), is definitively not a monopoly.
It more or less is, from a legal stand point, or atleast when referring to anti-trust laws.
That doesn't mean that they are doing anti-competitive stuff and are viable for enforcement, being a monopoly in an open market is not illegal, it does mean that with that level of marketshare they have some legal limitations that their competitors don't have. Usually it's a limit on merges, acquisitions, price setting and bundling.
In the EU you don't even need market dominance to break anti-trust law, while in the US you do. In either case, Chrome is not committing anti-competitive behavior nor is it the only option on the market, hence it is not a monopoly.
Being a popular product in a market full of consumer options is not a monopoly. If Chrome prevented you from downloading other browsers, then that would be monopolistic behavior, but Chrome is not doing that.
Your argument would be easier to receive if you enlightened your reader with what you think a monopoly is, rather than just framing it as something it is not.
I just explained it - monopoly is not a complex economic principle. When consumers have easy access to multiple competing products or services in a market supply, there is not a monopoly by the definition of the word monopoly. This is semantics, not an argument: https://www.google.com/search?q=define%3Amonopoly
It's not well received because, as GP said, people have the opinion that Chrome is a monopoly because they lack the empathy to understand that consumers are choosing something they don't like, and they would prefer it was a monopoly because they want a reason to break it up.
You did the same thing again (defining something by what it is not). This does not help another person understand you, which I'm assuming you want since you seem to care a lot about this subject.
I've told you twice what would help me understand, so at this point I'm going to have to respectfully decline to discuss it further. I hope you have a nice day.