Firefox has lost a lot of market share to Chrome (something like 30% vs. 14%). Internet Explorer has too. Considering Google only launched a browser in '08, it's pretty impressive they're at something like 50%.

Mozilla is still doing a lot of awesome stuff (web assembly, rust, servo, etc...), and I personally still choose Firefox over Chromium. As a user, I do have complaints about the direction on a number of things though.

One of the simpler things I'm surprised I haven't seen yet is a decent native text editor, considering how much relies on editing text in a browser.