Gmail Settings Extender

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Gmail Settings Extender",
  "description": "Bookmark mails and start compose in chrome-like tabs, add custom rich-text editor, auto add CC/BCC, reverse conversations and more..",
  "version": "4.2",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhuTu/SkC+MaUwG18UtiOtfUIA0mF+wfWp27v1RZrL+O/99uynM6YVdnv7b4fSjm42wYnHC0n6wHUbIOWl3vLcJtGtH55NKT5bEq+/gwF367MiQpVeFLMu8E1NJ4O20/yqIKe6StSIMZM77yTomWaIC5J1Bhjo0Z2Al1+KIj0qQ5vQS70x0lrt1FYpymx9AjBU8s8CNPJ3LX/gTR0+0sYzuZn9LsgyjSs/peTF8EdaPblYMDKUBBbvhiqh7DnSDAw/IIxGAQSta9b/NN488dwJ0ROx331wDLp6ephtNnF/b4bBUbE8ZsSsPsYEl7Msy4x9gwQGUSgjQtdL+TuiW3jRQIDAQAB",
  "content_scripts": [
    {
      "matches": [
        "*://mail.google.com/*"
      ],
      "js": [
        "scripts/extensionInjector.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "service_worker": "scripts/background.js"
  },
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "action": {
    "default_title": "Extension Options",
    "default_popup": "options/options.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "scripts/*",
        "css/style.css",
        "options/SignatureExample.png",
        "plugins/tinymce/*"
      ],
      "matches": [
        "*://mail.google.com/*"
      ]
    }
  ],
  "host_permissions": [
    "https://mail.google.com/"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}