Examine source code of Quick Search for Amazon

{
  "manifest_version": 2,
  "version": "0.1.1resigned1",
  "name": "Quick Search for Amazon",
  "description": "Select a product name in current browser tab and click the popup to get the product price",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.amazon.com/",
    "activeTab",
    "storage"
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png"
  },
  "homepage_url": "http://add0n.com/quick-search.html",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "data/panel/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*"
      ],
      "js": [
        "data/inject.js"
      ],
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{40060ac5-2740-40f3-b62f-77bc23099e11}"
    }
  }
}