I think I'm one of those people. Performance of Firefox has always been completely unacceptable to me.
When Firefox came out I continued to use the Mozilla browser. (I wonder if anybody remembers that one.) At that point I couldn't understand why people were so excited about Firefox. To me it looked like the Mozilla browser with a new icon, half the features, double the bloat, and half the speed. I distinctly remember that when Firefox came out Mozilla was a much better browser!
When Firefox came out I continued to use the Mozilla browser. (I wonder if anybody remembers that one.) At that point I couldn't understand why people were so excited about Firefox. To me it looked like the Mozilla browser with a new icon, half the features, double the bloat, and half the speed. I distinctly remember that when Firefox came out Mozilla was a much better browser!