Examine source code of Faceit Elo Calculator

{
  "manifest_version": 2,
  "name": "Faceit Elo Calculator",
  "version": "0.2.11",
  "description": "Show Elo Gain/Loss for Faceit Matches",
  "browser_action": {
    "default_icon": "./assets/icon-512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "faceitelocalc@dandrews.net"
    }
  },
  "icons": {
    "16": "./assets/icon-512.png",
    "48": "./assets/icon-512.png",
    "128": "./assets/icon-512.png"
  },
  "permissions": [
    "https://*.faceit.com/en/csgo/room/*",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.faceit.com/en/csgo/room/*"
      ],
      "js": [
        "./dist/contentScripts/index.global.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "dist/contentScripts/style.css"
  ]
}