Examine source code of url-reading-tracker

{
  "manifest_version": 3,
  "name": "url-reading-tracker",
  "version": "1.11.7",
  "description": "Tracks all URLs that one have read",
  "browser_specific_settings": {
    "gecko": {
      "id": "url-reading-tracker@jonarthurito",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Mark as read",
    "default_icon": "icon.svg",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "toast.css"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}