Examine source code of Compares product prices

{
  "manifest_version": 2,
  "name": "PriceBlink",
  "version": "1.0",
  "description": "Compares product prices across retailers.",
  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "PriceBlink"
  },
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e32724e-92bb-4d81-b479-a403ddb28f0b}"
    }
  }
}