Examine source code of Creator Codes

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.3.1",
  "icons": {
    "16": "/icons/icon16.png",
    "48": "/icons/icon48.png",
    "128": "/icons/icon128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "identity"
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "creator-codes-gecko@creatorcodes.com"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Creator Codes",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}