Just pick one - All the Fox functionality without bloatware
Librewolf - https://librewolf.net/
Waterfox - https://www.waterfox.com/
Zen Browser - https://zen-browser.app/
More browsers here - https://alternativeto.net/category/browsers/firefox-based/
You can also use this add to disable the shitload ai function in many search engines in one go
https://addons.mozilla.org/en-US/firefox/addon/disable-ai/
GitHub page - https://github.com/jruns/disable-ai
You can find all the links on Mastodon<
Again, burden of proof is on the person making the claim. Whether or not you choose to believe them, when they have provided zero sources for their claim, is up to you.