Given that a huge number of Chrome users probably come from societies that actively despise this kind of stuff, it might actually backfire.
Lucky for them I guess most people outside of HN probably never even read that marketing material, so I think it's more of a circle jerk for the marketing dpt.
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.
Mozilla has hundreds of millions of dollars at minimum, very likely billions. It's absurd that they're failing so miserably, and it's obscene that their CEO has taken increasingly large 8 figure bonuses while the company has floundered under her leadership.
Self respect?
That may have helped but chrome really was a great browser.
I don't use chrome and haven't done so outside of work for over a decade.
And Firefox has always had themes. Real themes. Colorways is just some coloring and it's not even staying around for these supposed mainstream users to enjoy
When done in the physical world this is called decorating, I guess theming is just a digital version of hanging a print from Ikea on the wall. When I do this sort of thing, I usually do accomplish something, because I like looking at pretty things, doing so makes me happier, making my things prettier helps me feel a bit happier when I look at them. Whether that has value depends on perspective, though I feel if it doesn't then that perspective is a pretty dismal one. It's also a way to make an abstract and alien thing feel a bit more familiar and "one's own", and computers are plenty alien and intimidating for a lot of people.
They don't understand people love Firefox because it's not Chrome. Not because it's not Chrome enough.
You are not alone. I'm starting to think something is wrong with me because I don't give an iota of a damn about any of this. I have watched people just get sucked into the rabbit hole of browsing for themes for the their browser while accomplishing exactly nothing after being overwhelmed and paralyzed by the choices. (Kinda like trying to find something to watch on streaming platforms)
Me, I have the default desktops from the OS, mobile OS, etc. I have too many windows covering my desktop to even care what it looks like. Yes, that's me, and I'm not even close to being everyone else. If this is the thing that convinces people to stop using Chrome, then fine. Spend time making the UI customizable to the point it looks like a MySpace background because that's what 99.9999% of people not me want. I'll do me, you do you.