Examine source code of Steamify Humble Bundle

{
  "manifest_version": 2,
  "name": "Steamify Humble Bundle",
  "author": "PixelForge",
  "version": "1.4",
  "description": "Changes the appearance of Humble Bundle's game bundle pages into a cleaner, Steam Store-inspired layout for easier browsing.",
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "src/popup.html",
    "default_icon": {
      "128": "resources/logo.png"
    }
  },
  "permissions": [
    "storage",
    "https://*.humblebundle.com/*",
    "https://store.steampowered.com/api/*",
    "https://api.steampowered.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.humblebundle.com/games/*"
      ],
      "js": [
        "src/games.js"
      ],
      "css": [
        "src/style.css"
      ]
    },
    {
      "matches": [
        "https://*.humblebundle.com/membership/*"
      ],
      "js": [
        "src/membership.js"
      ],
      "css": [
        "src/style.css"
      ]
    }
  ],
  "icons": {
    "128": "resources/logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c905e0a6-5d94-4e88-9552-83d46b73358e}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}