title: Chrome extension (content scripts and match patterns) - only match digits in URL
body: <p>I'm about to write my first Chrome Extension, but I'm just wondering if you can really only use "*" and "?" when declaring the "matches" pattern and the "include_globs" and "exclude_globs" patterns in manifest.json?</p>
  
  <p>With regex, I'd declare this kind of pattern: "example.com/[0-9]+"</p>
  
  <p>"example.com/*" however would match any kind of characters after "example.com/", but I want only digits to be matched.</p>
  
  <p>Is that possible?</p>