Boomerang for Gmail

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Boomerang for Gmail",
  "version": "1.6.1",
  "description": "Meeting scheduling and email management tool trusted by millions. Schedule meetings, track responses, send later, and more.",
  "background": {
    "service_worker": "background.js"
  },
  "permissions": [
    "management",
    "activeTab"
  ],
  "manifest_version": 3,
  "icons": {
    "16": "b4g_16.png",
    "48": "b4g_48.png",
    "128": "b4g_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "b4g_message_ui.js",
        "b4g.js"
      ],
      "css": [
        "css/b4g_message_ui.css"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_icon": {
      "19": "b4g_19.png",
      "38": "b4g_38.png"
    },
    "default_popup": "popup.html",
    "default_title": "Boomerang - Send this page later"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "b4g_128.png",
        "inbox_pause_dialog.html",
        "login_dialog.html",
        "b4g_bookmarklet_1.5.6.js",
        "css/extensionsafejqueryui_1.5.6.css",
        "css/extensionsafestyle_1.5.6.css",
        "b4g_bookmarklet_1.5.7.js",
        "css/extensionsafejqueryui_1.5.7.css",
        "css/extensionsafestyle_1.5.7.css",
        "b4g_bookmarklet_1.5.8.js",
        "css/extensionsafejqueryui_1.5.8.css",
        "css/extensionsafestyle_1.5.8.css",
        "b4g_bookmarklet_1.5.9.js",
        "css/extensionsafejqueryui_1.5.9.css",
        "css/extensionsafestyle_1.5.9.css",
        "b4g_bookmarklet_1.6.0.js",
        "css/extensionsafejqueryui_1.6.0.css",
        "css/extensionsafestyle_1.6.0.css",
        "b4g_bookmarklet_1.6.1.js",
        "css/extensionsafejqueryui_1.6.1.css",
        "css/extensionsafestyle_1.6.1.css"
      ],
      "matches": [
        "https://mail.google.com/*"
      ]
    }
  ]
}