Earlier quoted context omitted.
I think the entire point is that Mozilla has depended on people "like you" to stay relevant for years and knows that's not a great long-term growth strategy compared to appealing to the general populace who cares about things like customizable themes.
Chrome isn't the most common browser on the planet because of its identity politics. It's actually addressing real needs(i.e. a default browser on common computing device - used to be reason for antitrust but w/e), rather than a loud vocal subsection of a handful of societies, so I don't think that that growth strategy works. Given that a huge number of Chrome users probably come from societies that actively despise…
I'm pretty sure Chrome is the most common browser on the planet because Google abused its market position in search and mobile (Android) to shove it down people's throats, helped along by bundling it with other installers. Everything else was secondary.