Examine source code of Dota2 match tracker

{
  "manifest_version": 2,
  "name": "Unofficial liquipedia Dota2 match listing",
  "version": "2.3",
  "description": "Tells you what Dota2 matches are currently playing",
  "homepage_url": "https://github.com/JoeDinn/LiquipediaExtension",
  "icons": {
    "48": "icons/active-48.png",
    "96": "icons/active-96.png"
  },
  "permissions": [
    "*://liquipedia.net/dota2/*",
    "storage",
    "notifications",
    "alarms",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_action": {
    "default_icon": "icons/inactive-38.png",
    "default_title": "Dota 2 match tracker!",
    "default_popup": "popup/ongoing_matches.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "settings/options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@dota2match.com"
    }
  }
}