Google Calendar - Secondary timezone switch

Quickly change secondary timezone based on world clock

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Google Calendar - Secondary timezone switch",
  "description": "Quickly change secondary timezone based on world clock",
  "version": "1.0",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "https://calendar.google.com/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "icons": {
    "16": "icon_16.png",
    "32": "icon_32.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  }
}