Examine source code of Anner

{
  "manifest_version": 2,
  "name": "Anner",
  "version": "1.4.1",
  "description": "Search selected text on annas-archive",
  "permissions": [
    "contextMenus",
    "tabs",
    "storage",
    "file:///*"
  ],
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "polyfill.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "48": "icons/48.png"
    },
    "default_title": "Anner",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      },
      "id": "{74fd3566-b828-4dad-95f3-cf637b56fecc}"
    }
  }
}