Examine source code of Angular Highlighter

{
  "manifest_version": 2,
  "name": "Angular Highlighter",
  "version": "1.0",
  "description": "Highlights instances of 'Angular' on the current website",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{aee036ad-680e-4960-8b5e-a0babbe71b90}"
    }
  }
}