Examine source code of FF Image Search

{
  "manifest_version": 2,
  "name": "FF Image Search",
  "version": "1.1resigned1",
  "description": "Lets you right click on an image and run a Google image search for it.",
  "permissions": [
    "menus"
  ],
  "background": {
    "scripts": [
      "search.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6ad81eb-f7e0-4b73-b817-bf1f6b27d2fd}"
    }
  }
}