I love Firefox. And I love the find-in-page option (command-f) for searching for text. But I hate that if I enter text not in the page, it plays that obnoxious error sound for each key I press. Of course, like everything else in Firefox, you can turn this off rather easily.

1. Type about:config into the location bar to get to the configuration options
2. Put typeahead in the filter box
3. Click on accessibility.typeaheadfind.enablesound to change it to false

That’s it. It’ll take you 10 seconds, and will make your user experience that much more enjoyable.