[LordNight]

>The constant nonsense UI redesigns that come about with every new update. The instability, and ridiculous resources consumption. The slowness and slugishness.

>I want a browser that works, respects my privacy, stays out of my way and lets me get shit done. A browser built for professionals, by professionals. I want a consistent UI that remains stable over time. I'm easily willing to pay for such a browser.

>Firefox used to be it, but I no longer feel like it is. Any suggestions for what to try next?

That's my experience as well. I was using FF from v 1.0 back in 2004. Upgrade to Quantum almost gave me a heart attack because it ruined majority of addons and disabled custom themes. Upgrade to "megabar" was a final straw for me. I've spent ~ 3 hours, but finally migrated to Pale Moon ... and it's like I'm back in 2004. Even Noia theme is working again.

FF, in my opinion, went full circle: from being the most functional and the most customizable browser to being the new IE6. There are no redeeming qualities left really.