

These issues are posted about about all the time:
https://www.reddit.com/r/firefox/comments/1030fri/why_does_firefox_feel_slowchoppy/
https://www.reddit.com/r/firefox/comments/y5o8io/i_love_firefox_but_many_popular_websites_are_slow/
https://www.reddit.com/r/firefox/comments/11utln3/firefox_feels_slow/
https://www.reddit.com/r/firefox/comments/11y2139/why_is_firefox_so_slow/
https://www.reddit.com/r/firefox/comments/gg8424/why_is_firefox_so_slow/
https://www.reddit.com/r/firefox/comments/12k4ysr/why_does_reddit_run_slow_on_my_firefox/
And everyone wonders why Firefox has less than a 3% market share
EDIT: Also here are actual benchmark numbers for a more quantitative analysis: https://www.pttrns.com/fastest-browsers-for-windows-10/
Well in my experience, Firefox is definitely slower, and it is immediately apparent that it is much jankier than Chrome. And as the many posts I linked above show, I am not the only one with this experience.
Also it’s hilarious how I give a source and now the goal posts are moved and the benchmarks are “synthetic”
CPU and GPU benchmarks are also “synthetic” but they still show actual differences between what is being tested.
Qualitatively and quantitatively, Firefox is slower.