No, Firefox has become faster and overall better. But there was a price paid, and not much gain in other terms. Extensions were lost and Mozilla still didn't deliver important APIs which people wait for over 2 years now. Number of users didn't really grow yet. New Engine also has still several problems. And the important android-version didn't receive the update as many people anticipated. There were also some privacy-related scandals from Mozilla, which seems to have eaten most of the shaky progress from that time.

Overall, still many reasons for people to be grumpy.