Examine source code of Syrian Flag Replacer

{
  "manifest_version": 2,
  "name": "Syrian Flag Replacer",
  "version": "1.0",
  "description": "Replaces the old regime flag with the flag of the Syrian revolution.",
  "author": "Ubadah Sabbagh",
  "homepage_url": "https://ubadahsabbagh.com",
  "permissions": [
    "<all_urls>",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "flagReplacer.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "revolution-flag.png"
  ],
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{16f3ecb6-1703-4d85-a67b-ffbfbbe0a8af}"
    }
  }
}