Examine source code of Google Forms Auto Filler

{
  "manifest_version": 3,
  "name": "Google Forms Auto Filler",
  "version": "0.9.9",
  "description": "Automatically fills google forms. You can save your answers and it fills the form with your answers.",
  "homepage_url": "https://github.com/muratalperen/GoogleFormsAutoFiller",
  "browser_specific_settings": {
    "gecko": {
      "id": "googleFormsAutoFiller@muratalperen"
    }
  },
  "icons": {
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "action": {
    "default_icon": "images/icon-32.png",
    "default_title": "Google Forms Auto Filler",
    "default_popup": "popup/menu.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://docs.google.com/forms/*"
      ],
      "js": [
        "scripts/GoogleForm.js"
      ]
    }
  ],
  "host_permissions": [
    "https://docs.google.com/*"
  ]
}