Examine source code of Humble Store Filters

{
  "manifest_version": 3,
  "name": "Humble Store Filters",
  "version": "0.6.2",
  "description": "Adds options to filter on the humble bundle store page based on steam data and the platforms the game is sold for on humble.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://store.steampowered.com/dynamicstore/userdata/",
    "https://api.steampowered.com/ISteamApps/GetAppList/v0002",
    "https://api.steampowered.com/IPlayerService/GetOwnedGames/v1/",
    "https://login.steampowered.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.humblebundle.com/*"
      ],
      "js": [
        "filters.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "action": {
    "default_popup": "options/options.html"
  },
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "humblefilters@jokru"
    }
  }
}