Examine source code of Create Reminders

{
  "manifest_version": 2,
  "name": "Create Reminders",
  "description": "Save reminder dates from selected text and review them later in a popup.",
  "version": "0.1.0",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "identity",
    "tabs",
    "http://localhost:19092/*",
    "https://www.googleapis.com/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Reminders",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg"
    }
  },
  "web_accessible_resources": [
    "capture-dialog.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "create-reminders@kshk123.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}