Examine source code of MyIDS

{
  "manifest_version": 2,
  "name": "MyIDS",
  "version": "1.4",
  "description": "This extension allows any image to be submitted to search MyIDS visually",
  "icons": {
    "48": "icons/icon48.png"
  },
  "applications": {
    "gecko": {
      "id": "techdbmyids@image-data.com"
    }
  },
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "*://*/*",
    "menus",
    "tabs",
    "contextMenus"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "background.js"
      ]
    }
  ]
}