Copy Gmail Message-Id

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Copy Gmail Message-Id",
  "version": "0.3.0",
  "description": "Copies the Message-Id of a message in the new Gmail UI",
  "icons": {
    "16": "public/icons/icon16.ico",
    "32": "public/icons/icon32.ico",
    "48": "public/icons/icon48.ico",
    "128": "public/icons/icon128.ico"
  },
  "browser_action": {
    "default_icon": "public/icons/icon16.ico"
  },
  "content_scripts": [
    {
      "js": [
        "assets/content-script-loader.content.ts.54357fa5.88d9e17b.js"
      ],
      "matches": [
        "https://mail.google.com/mail/u/*"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "resources": [
        "assets/content.ts.54357fa5.js"
      ],
      "use_dynamic_url": true
    }
  ]
}