Examine source code of LoL Pulse

{
  "manifest_version": 2,
  "name": "LoL Pulse",
  "description": "LoL Pulse provides a convenient dashboard for League of Legends esports information.",
  "version": "1.3.1",
  "icons": {
    "128": "icon-128.png"
  },
  "permissions": [
    "webRequest",
    "storage",
    "alarms",
    "https://*.lolesports.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "LoL Pulse",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{95e70c78-d77d-4182-9c85-f8493f486fe0}"
    }
  }
}