Examine source code of KB ID Finder

{
  "manifest_version": 2,
  "name": "KB ID Finder",
  "description": "Ensures that GUID-based Microsoft Support pages list the technical KBIDs.",
  "version": "0.1.2",
  "developer": {
    "name": "Valters Jansons",
    "url": "https://github.com/sigv/KbidFinder"
  },
  "author": "Valters Jansons",
  "homepage_url": "https://github.com/sigv/KbidFinder",
  "content_security_policy": "default-src 'self'; object-src 'self'",
  "icons": {
    "48": "icons/ZSBFoikEu_Q.png",
    "96": "icons/ZSBFoikEu_Q@2x.png",
    "192": "icons/ZSBFoikEu_Q@4x.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://support.microsoft.com/*"
      ],
      "js": [
        "kbid_finder.js"
      ]
    }
  ],
  "browser_action": {
    "default_area": "menupanel",
    "default_icon": {
      "48": "icons/ZSBFoikEu_Q.png",
      "96": "icons/ZSBFoikEu_Q@2x.png",
      "192": "icons/ZSBFoikEu_Q@4x.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kbid_finder@sigv.github.com"
    }
  }
}