Examine source code of Insearch

{
  "manifest_version": 2,
  "name": "Insearch",
  "version": "1.1resigned1",
  "description": "Search a word meaning in popup by using google",
  "icons": {
    "48": "images/icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardWrite",
    "storage"
  ],
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_title": "Insearch"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{750b2f91-7948-4cf2-a476-01442287a5f0}"
    }
  }
}