Examine source code of eBay Search Effective

{
  "manifest_version": 2,
  "name": "MEbay",
  "version": "1.0.5.9",
  "description": "Adds item info to search page. Also create your custom list of good and bad sellers.",
  "applications": {
    "gecko": {
      "id": "{87d46562-3b90-43de-9146-99fff39c1e12}"
    }
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "options_ui": {
    "page": "settings/options.html",
    "browser_style": false
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.ebay.com/sch/*",
        "*://*.ebay.com/itm/*"
      ],
      "exclude_matches": [
        "*://*.ebay.com/sch/*/m.html*"
      ],
      "js": [
        "MEbay.js"
      ]
    }
  ],
  "permissions": [
    "*://*.ebay.com/*",
    "webRequest",
    "storage"
  ]
}