Examine source code of Steam Little Toolkit

{
  "manifest_version": 2,
  "name": "Steam Little Toolkit",
  "version": "1.20",
  "description": "Tweaks the Steam store to make a better experience, complete your experience with the SteamDB Extension!",
  "homepage_url": "https://github.com/VoidlessSeven7/Steam-Little-Toolkit-Browser-Extension/",
  "icons": {
    "32": "assets/images/icons/steam_32.png",
    "48": "assets/images/icons/steam_48.png",
    "64": "assets/images/icons/steam_64.png",
    "98": "assets/images/icons/steam_98.png",
    "128": "assets/images/icons/steam_128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "assets/images/icons/steam_64.png",
    "default_title": "Steam Little Toolkit",
    "default_popup": "./assets/html/popup.html"
  },
  "options_ui": {
    "page": "./assets/html/popup.html"
  },
  "background": {
    "scripts": [
      "./assets/js/common.js",
      "./assets/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://store.steampowered.com/*",
        "*://steamcommunity.com/linkfilter/*"
      ],
      "exclude_matches": [
        "*://store.steampowered.com/cart/*",
        "*://store.steampowered.com/checkout/*",
        "*://store.steampowered.com/login/*",
        "*://store.steampowered.com/join/*"
      ],
      "run_at": "document_idle",
      "js": [
        "./assets/js/common.js",
        "./assets/js/content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "saalejandroromero@gmail.com",
      "strict_min_version": "58.0"
    }
  }
}