Examine source code of Steam Artwork Helper

{
  "manifest_version": 3,
  "name": "Steam Artwork Helper",
  "version": "0.9",
  "description": "Загрузка контента и предпросмотр оформления Steam-профиля",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon48.png",
    "default_title": "Steam Design Suite"
  },
  "permissions": [
    "scripting",
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "https://steamcommunity.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://steamcommunity.com/sharedfiles/edititem/*"
      ],
      "js": [
        "content_button1.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://steamcommunity.com/workshop/edititem/*"
      ],
      "js": [
        "content_button2.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://steamcommunity.com/sharedfiles/editguide/*"
      ],
      "js": [
        "content_button3.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://steamcommunity.com/id/*",
        "https://steamcommunity.com/profiles/*"
      ],
      "js": [
        "preview_elems/preview.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "sounds/*.mp3",
        "icons/*.png",
        "company_links/main.gif"
      ],
      "matches": [
        "https://steamcommunity.com/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "steam-artwork-helper@designsteam.ru",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Открыть Steam Artwork Helper"
    }
  },
  "homepage_url": "https://t.me/designsteam",
  "author": "ky0fu",
  "short_name": "SDS"
}