Examine source code of autojot-browser-extension

{
  "manifest_version": 3,
  "name": "autojot-browser-extension",
  "description": "Autojot anywhere",
  "version": "1.0.3",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "contextMenus",
    "scripting",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Autojot"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support.extension@autojot.com"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}