Examine source code of Reverse Search Images

{
  "manifest_version": 2,
  "name": "Reverse Image Search",
  "version": "1.0",
  "description": "Reverse Searches Images.",
  "icons": {
    "48": "icons/revimg48.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "*://*/*"
      ],
      "js": [
        "reverseimg.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  }
}