Examine source code of Steam : Game finder

{
  "manifest_version": 2,
  "name": "Steam : Game finder",
  "short_name": "GameFinder",
  "description": "Steam : Game Finder allows you to find which multiplayer games are shared within a group of steam users",
  "version": "1.0.5",
  "version_name": "GameFinder 1.0.5",
  "homepage_url": "https://nebukam.github.io/steam-game-finder/",
  "icons": {
    "16": "icons/16x16.png",
    "32": "icons/32x32.png",
    "48": "icons/48x48.png",
    "64": "icons/64x64.png",
    "72": "icons/72x72.png",
    "96": "icons/96x96.png",
    "120": "icons/120x120.png",
    "128": "icons/128x128.png",
    "144": "icons/144x144.png",
    "152": "icons/152x152.png",
    "180": "icons/180x180.png",
    "192": "icons/192x192.png",
    "384": "icons/384x384.png",
    "512": "icons/512x512.png"
  },
  "minimum_chrome_version": "93",
  "author": "Timothé Lapetite",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16x16.png",
      "32": "icons/32x32.png",
      "48": "icons/48x48.png",
      "64": "icons/64x64.png",
      "72": "icons/72x72.png",
      "96": "icons/96x96.png",
      "120": "icons/120x120.png",
      "128": "icons/128x128.png",
      "144": "icons/144x144.png",
      "152": "icons/152x152.png",
      "180": "icons/180x180.png",
      "192": "icons/192x192.png",
      "384": "icons/384x384.png",
      "512": "icons/512x512.png"
    },
    "default_title": "GameFinder"
  },
  "permissions": [
    "storage",
    "https://nebukam.github.io/steam-game-finder/",
    "https://nebukam.github.io/*",
    "https://steamcommunity.com/*",
    "https://cdn.akamai.steamstatic.com/steamcommunity/public/*",
    "https://steamcdn-a.akamaihd.net/steam/apps/*",
    "https://cdn.cloudflare.steamstatic.com/steamcommunity/public/*",
    "https://steam-game-finder-server.glitch.me/*",
    "https://store.steampowered.com/app/*",
    "https://ipinfo.io/json"
  ],
  "optional_permissions": [
    "unlimitedStorage"
  ]
}