I have been using Firefox ever since, like, 2004 since I ditched Internet Explorer in favor for it.  In the last few years, Firefox has become a bloated piece of shit.  I now run Linux only and still use Firefox.  I do like it but I am sooo tempted to switch to Chrome.  They keep copying Chrome anyway so what’s the point of using a bloated browser that tries to mimic Chrome?  And if you wanna talk about unpopular features in Firefox why not start by removing the built in advertisements.  That shit sucks.  I don't care if the ads are approved by, or from, Mozilla.  They are ads.  And they're BUILT IN to my browser.
Remove that shit.  I care more about ads and invasion of privacy than I do about bloat.