Examine source code of Form Secretary - Smart Autofill Assistant

{
  "manifest_version": 2,
  "name": "Form Secretary - Smart Autofill Assistant",
  "description": "Smartly detects form fields on any page and autofills your custom values with a single click.",
  "version": "1.0.2",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "contextMenus",
    "tabs",
    "clipboardWrite",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "form-secretary@ayaanqadri.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    "icons/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Form Secretary",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}