I like Firefox a lot.
But it isn't very nice with WPAs, an area of my interest, and downloads PDFs instead of showing them...
Plus I have seen Vivaldi is pretty good for quite some things, like tabs groups and tabs hibernation, has notes, a cool calendar...

But Chrome's console...
It's the only reason I stay with Firefox. (I not only use it at work, but I also use the command line as a pocket JS engine for little scripting and parsing.)
If only I could get selection bracket wrapping and a multiline editor... is it that hard?