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.
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.
Surely the browser could enforce a limit on a domain, and make sure that the real page you came from (typically the search engine) is prominently displayed.
