Examine source code of DckToGgl

{
  "manifest_version": 2,
  "name": "DckToGgl",
  "version": "1.3resigned1",
  "description": "Switches from a duckduckgo.com search to a google.com search with the press of one button",
  "icons": {
    "48": "icons/dcktoggl.svg",
    "96": "icons/dcktoggl.svg"
  },
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/switch_false.png",
    "default_title": "Switch to Google"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "switchWithKeypress": {
      "suggested_key": {
        "default": "Alt+Shift+G"
      },
      "description": "Does the same as pressing the button"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa5c9f30-8a7f-4f3a-9551-82a352aed3b6}"
    }
  }
}