A browser feature I wasn't aware of for too long: long press the back button, to get a list of recent URLs, allowing you to skip anything trying to hijack the back button.
That’s surely bounded now much it can show, so an attacker can just fill it up till the api throws an error
Or right click
The most egregious cases of back button hijacking will leave you with a very long list of entries, which is why it's good to see Google taking this seriously. It's annoying and can be outright malicious in many cases on the part of the offending website.