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manifest.json
{
  "background": {
    "service_worker": "background.js"
  },
  "homepage_url": "https://gmplus.io?utm_source=gm-schedule",
  "content_scripts": [
    {
      "css": [
        "select2.css"
      ],
      "js": [
        "inboxsdk.js",
        "inject/gmassloader.js"
      ],
      "matches": [
        "http://mail.google.com/*",
        "https://mail.google.com/*",
        "https://inbox.google.com/*",
        "http://inbox.google.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "description": "Gmail Schedule tool, Schedule your email to send at a later date and time in Gmail.",
  "icons": {
    "48": "icons/GMass48.png",
    "128": "icons/GMass128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/campaign.png",
        "icons/sheet.png",
        "icons/GMass32.png",
        "icons/GMass128.png",
        "inject.js"
      ],
      "matches": [
        "http://mail.google.com/*",
        "https://mail.google.com/*",
        "https://inbox.google.com/*",
        "http://inbox.google.com/*"
      ]
    }
  ],
  "manifest_version": 3,
  "name": "__MSG_name__",
  "permissions": [
    "scripting"
  ],
  "host_permissions": [
    "http://mail.google.com/*",
    "https://mail.google.com/*"
  ],
  "short_name": "GSchedule",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0.6",
  "default_locale": "en"
}