~75% of Mozilla revenue comes from Google. Edge would be a much safer bet if you don't want a browser funded primarily with ad dollars.
Yes you can turn all this off, but in default mode it is maddening.
Had I not needed to specifically test Edge on Windows 11, I'd have just pressed and held the power button, then wiped the disk and installed something else if I'd encountered that experience on something I purchased to use for some non-browser-testing productive purpose.
The funny thing is Chrome is actually made by an advertising company, and it's significantly less aggravating, somehow.
Speaking of adware and spyware, doesn't Firefox still have Google as its default search website? They are not Google, but literally selling you to Google, that's like even worse?