Examine source code of Simple COVID-20 Tracker

{
  "manifest_version": 2,
  "name": "Simple COVID-20 Tracker",
  "version": "1.0",
  "description": "A simple add-on to display basic COVID-20 statistics.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "COVID-20 Tracker"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f011b88-f0d1-459b-a0a5-b870b5acacc9}"
    }
  }
}