HN Mute is a Firefox browser extension that allows you to mute words on Hacker News. I love browsing HN, but I'm not interested in all the topics being discussed there. Lobsters is better in this regard since it has tags that can be filtered out.
The following video demonstrates the usage:
The options page provides an input field for users to add keywords they want muted. These are case-insensitive. On the HN page, a script checks each story for against these keywords. It constructs new table of valid stories, which replaces the original.
The extension is available on Firefox on Android as well! Testing the extension for mobile was a nice experience.