I never Switched to Chrome in the first place. It felt like an uphill battle sometimes when Firefox deprecated the old add-on APIs, which made add-ons like CTR die.
However, in the past few years, Firefox has been improving left and right, with it's Rust components, containers in core, and it's new dialect in design. The recent improvements alone should convince someone to switch.
The reason why I stayed with Firefox is because Chrome is from, well, Google. It boggles my mind to see someone praising a browser that is from a an advertiser. They never put ads on the browser (I'm looking at you, Opera), but systematically did a lot to track it's users and make money out of it.
You can clearly see the difference in motivation when Firefox removing a whole API of add-ons vs Google removing one particular API feature.