You might want to install some browser extensions to block content. Then block all content (set to whitelist) and selectively add the sites you know.
If you end up on a new site with some amalgamation of letters that look familiar, the extension will rightfully block it and prompt you whether you want to whitelist or not. Big ole' red flag right there.
Of course it's not foolproof. It is just another layer in the strategy of defense-in-depth.