Not just worth it, that's who their userbase actually is !
Powerusers, privacy freaks and their immediate social circle that they managed to strong-arm into using Firefox.
That's their remaining 3% of market share and Mozilla remains absolutely oblivious to it.
"Let's add whitespace everywhere. Let's remove RSS support, let's change the UI and also let's add as much useless junk nobody asked for".
Don't.
And their CEO must go. The fish rots from the head.