Another poster has already suggested `uBlacklist` so I won't waste bandwidth by repeating the link, but I want to underline the utility of this extension, because it's transformed my experience of using Google search for code problems.

Before using this, I was finding the first page of my search results were overwhelmed with StackOverflow-scrapers, which returned SO answers reformatted into some sort of garbage and unreadable 'blog-post'.

Nowadays, after blocking twenty/thirty/fifty(?) of these sites, I get to where I want as fast as I did 10 years ago.