No, I wasn't "asked" by the browser publisher to trust them unless you use the word "ask" in a very broad (almost to the point of meaninglessness) sense: when I installed my browser, it simply started using its pre-packaged bundle of CA certificates. Which it regularly updates, I imagine, although it also never asked me about what the update source I'd like to use either.
You can say that I implicitly trust the browser vendor's judgement in what CAs to trust, by the virtue of using the browser, and I'd agree with that. But saying that I was asked by the browser publisher to trust them? No, I disagree, I wasn't. It was a silent decision.
