HTTP/2 and SPDY indicator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "HTTP/2 and SPDY indicator",
  "description": "An indicator button for HTTP/2, SPDY and QUIC support by each website.",
  "version": "1.0.0",
  "manifest_version": 2,
  "permissions": [
    "tabs"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "indicator.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "page_action": {
    "default_title": "HTTP/2 and SPDY",
    "default_icon": {
      "19": "icon-default.png",
      "38": "icon-default-scale2.png"
    }
  },
  "options_page": "options.html",
  "web_accessible_resources": [
    "options.js"
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon.png"
  }
}