If you want to block Gists from certain users on GitHub, you can use custom filter rules for uBlock Origin. This method will hide Gist snippets created by the specified users from appearing on the GitHub website, including on the discover page (https://gist.github.com/discover).
- Install the uBlock Origin browser extension if you haven’t already.
- Open uBlock Origin settings.
- Go to the My Filters tab.
- Add the following filter rules: