Earlier quoted context omitted.
The interpretation is not the problem. Whether he will do it, is actually secondary to the fact that he thinks cutting adblock can bringing in money. No, it will just kill the browser. The fact he thinks otherwise tells me how out of touch he is.
Firefox has a market share around 3%. Even most technologists stopped using it long ago. Many banks and government websites don’t even support it anymore and loudly tell people to use Chrome instead, especially in developing countries. Nothing can kill Firefox, because it’s already dead for all practical purposes.
Because their web developers are too lazy to write anything to proper standards. They're doing some kind of lazy "Check for Chrome, because everyone must be running that, if not, redirect to an Unsupported page".
I've yet to find a website that "refuses" to work in Firefox which doesn't work just fine when I use a user agent switching extension to present a standard Chrome on MacOS or Chrome on Windows useragent.