I experienced the same issue on Firefox 128 x86_64 the other day, but it seems to have disappeared now. I just checked with Aquafox, and Google Search is working as it should (image search works properly too when changing the user agent).
On that note, I've been trying out mobile user agents, and I'm actually surprised that YouTube plays just fine. In my experience, the desktop version would mostly freeze up and give playback errors
I experienced the same issue on Firefox 128 x86_64 the other day, but it seems to have disappeared now. I just checked with Aquafox, and Google Search is working as it should (image search works properly too when changing the user agent).