Examine source code of VG Plus Blocker

{
  "manifest_version": 2,
  "name": "VG Plus Blocker",
  "version": "1.0",
  "description": "Blocks subscription articles (VG+) on vg.no",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.vg.no/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dcbf6bf0-1759-4953-a519-17d01924b27c}"
    }
  }
}