It is extremely disingenuous to claim the only browser to still refuse to block third party cookies by default, because it helps their ad partners, is "more secure".
The only way in which Chrome is more secure at anything appears to be securely forcing you to view ads via this API. And a shocking amount of malware fails to work when you use a running environment that 95% of society are not using.
So as someone who deals with enterprise software: Network effects.
Where I work, we treat Chrome as the malware it is: It's banned both by technical measures and security policy. We deploy Firefox, and begrudgingly deal with Edge when people insist on a Chromium-based browser. (At least Microsoft added some modicum of privacy settings here.)
Here's what I've learned over the past several years: Web developers are lazy. We're commonly told such and such app or service "only works on Chrome" or they'll "only support on Chrome". When we call for support, half the time we'll get told it's because we're not on Chrome, and I have to actually prove to them on an isolated machine that the issue occurs on Chrome so they'll shut the heck up and do their job. "Oh, I found an issue on our server" after I spent two hours trying to convince them their app works fine on Firefox.
In most cases, things "not working on Firefox" entails exempting a site from the popup blocker. In 2023, troubleshooting alternative browsers is usually... roughly that easy. But blaming your web browser is easy and lets them shift blame, so that's what they do.
But enterprise software companies have completely turned Chrome into the modern Internet Explorer: The only browser they'll even deal with. And since a lot of people buy Google's marketing that they know security and aren't completely clueless how security works (they are), people have by and large given in and installed Chrome.
The only way in which Chrome is more secure at anything appears to be securely forcing you to view ads via this API. And a shocking amount of malware fails to work when you use a running environment that 95% of society are not using.
You are far safer on Firefox than Chrome.