Gmail Labels as Tabs

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Gmail Labels as Tabs",
  "version": "2.2.4",
  "description": "Organize your Gmail mailbox labels as tabs.",
  "manifest_version": 2,
  "permissions": [
    "declarativeContent",
    "storage",
    "identity"
  ],
  "page_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icons/16.png",
      "32": "images/icons/32.png",
      "48": "images/icons/48.png",
      "128": "images/icons/128.png"
    }
  },
  "icons": {
    "16": "images/icons/16.png",
    "32": "images/icons/32.png",
    "48": "images/icons/48.png",
    "128": "images/icons/128.png"
  },
  "oauth2": {
    "client_id": "182667075532-ksut7cmajcg9qgvic145f469je6ldn11.apps.googleusercontent.com",
    "scopes": [
      "https://www.googleapis.com/auth/gmail.labels"
    ]
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "js/ui.js"
      ],
      "css": [
        "css/ui.css"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "script-src 'self' https://apis.google.com/; object-src 'self'",
  "web_accessible_resources": [
    "font/*.woff2"
  ]
}