Examine source code of Autofill

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "strict_min_version": "79.0",
      "id": "{143f479b-4cb2-4d8c-8c31-ae8653bc6054}"
    }
  },
  "name": "Autofill",
  "version": "11.9.0",
  "author": "tohodo.com",
  "default_locale": "en",
  "description": "__MSG_generalDescription__",
  "homepage_url": "https://groups.google.com/g/chrome-autofill",
  "icons": {
    "16": "images/icon16.png",
    "24": "images/icon24.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "background": {
    "scripts": [
      "js/eventPage.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon16-off.png",
      "24": "images/icon24-off.png",
      "32": "images/icon32-off.png"
    }
  },
  "commands": {
    "_execute_browser_action": {},
    "execute_all_profiles": {
      "description": "__MSG_generalExecuteAll__"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/autofill.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": false,
    "open_in_tab": true
  },
  "permissions": [
    "<all_urls>",
    "contextMenus",
    "storage",
    "unlimitedStorage"
  ],
  "web_accessible_resources": [
    "images/close*.png",
    "images/icon24.png",
    "sounds/*"
  ]
}