I don't think the Bitwarden extension uses content scripts—at least, it doesn't insert any elements into the webpage, which seemed to be the main issue that the article was bringing up.
Just to be clear, when I say autofill I'm not suggesting that it fills in passwords with zero interaction, but when you're on a website that Bitwarden has a password for, it shows a little flag on the extension icon, and you can click on it to fill the password.
Just to be clear, when I say autofill I'm not suggesting that it fills in passwords with zero interaction, but when you're on a website that Bitwarden has a password for, it shows a little flag on the extension icon, and you can click on it to fill the password.