Examine source code of YouTube Date Fixer

{
  "manifest_version": 2,
  "name": "YouTube Date Fixer",
  "version": "1.0",
  "description": "Replaces YouTube's relative time indicators with exact dates.",
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "https://www.youtube.com/*"
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1d81835-b981-4dfe-8448-047b2717a7ee}"
    }
  }
}