Which specific websites?
It could be that my baseline was the Chrome rendering, so any discrepancy was classified as "it's broken".
I have encountered a couple of (financial, natch) sites that insist on a Chromium-based browser in order to do vital operations like download statements. Switching browsers for those few exceptions is annoying, but not a deal-breaker (for me).
I get the same behavior for the people queries like "Barack Obama". (Android 14, Pixel 4a)
Install the Google Search Fixer from the Firefox add on store and it looks exactly the same.
edit: turns out I have the search fixer add-on that is mentioned in a sibling comment installed.