Examine source code of Anner

{
  "manifest_version": 2,
  "name": "Anner",
  "version": "1.2.0",
  "description": "Search selected text on annas-archive",
  "permissions": [
    "contextMenus",
    "tabs"
  ],
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "polyfill.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{74fd3566-b828-4dad-95f3-cf637b56fecc}"
    }
  }
}