Examine source code of Steam Tweaks

{
  "manifest_version": 2,
  "name": "Steam Tweaks",
  "version": "0.1.3resigned1",
  "description": "Some tweaks for Steam website. Workshop button, less intrusive review creation, less intrusive nominate button, and auto scroll",
  "permissions": [
    "menus"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://store.steampowered.com/app/*"
      ],
      "js": [
        "jquery-3.2.1.min.js",
        "store_page.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{15b2afb3-8976-455e-8549-de4e27003e20}"
    }
  }
}