It is not about Chrome vs Firefox. It is about how much information they can get about you.
The idea behind the "I am not a robot" captcha is that if you act like a human, then you don't need to be shown pictures for further confirmation. The more you allow tracking, the more info they have to figure it out.
A big one is being logged in to your Google account. Having access to all your history really helps. And because Chrome heavily encourage you to setup a Google account, Chrome users are more likely to be logged in than Firefox (or other) users.
Spoofing your user-agent is likely to be worse. If you have a Chrome user-agent but your browser don't act like Chrome, that's a big red flag. Bots often spoof their user agents.
The idea behind the "I am not a robot" captcha is that if you act like a human, then you don't need to be shown pictures for further confirmation. The more you allow tracking, the more info they have to figure it out.
A big one is being logged in to your Google account. Having access to all your history really helps. And because Chrome heavily encourage you to setup a Google account, Chrome users are more likely to be logged in than Firefox (or other) users.
Spoofing your user-agent is likely to be worse. If you have a Chrome user-agent but your browser don't act like Chrome, that's a big red flag. Bots often spoof their user agents.