I suspect, but have no evidence, that this is in reaction to Microsoft basing the newest version of their browser on Chromium.
The solution is to use an Open Source browser, such as Firefox or some other alternative. That's going to require more developers though to pitch in and help get feature parity in their favorite Open Source browser.
I also have some concerns there, as the Firefox CEO Mitchell has said Mozilla tends to focus more on money. We've seen indicators of that recently with sponsored search. I remember the old AOL Browser and AOL Email, and the ads. I hope not, but could see Mozilla implementing ads in the Firefox UI area.
What I'd like to see is a browser that is built of swappable components working around a browser microkernel consisting of a web engine (Servo?), a JavaScript engine (Deno?), a plugin framework that works via messaging and can support various msg protocols (with two ref impls:ZeroMQ and Matrix). Think something like the Eclipse RCP, but for the Browser and Web browsing.
If this sounds interesting, send me a message. That's not an ad, I am interested in gauging the interest in a project like that.