The notification to enable enhanced safe browsing even shows up when you’re accessing Gmail on Firefox. It doesn’t even make any damn sense, this feature only works on Chrome. And of course they’ll never add a “don’t show again” option. Think I might just set Gmail to forward to my Proton account from now on.
Edit: found an article on how to forward to ProtonMail in case anyone else wants to know how. Seems very easy to do.