Examine source code of Splintertools

{
  "name": "Splintertools",
  "description": "Create the best team in Splinterlands! Figure out your win rate as you build your team",
  "version": "1.2.0.23",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://splinterlands.com/*"
      ],
      "css": [
        "main.css"
      ],
      "js": [
        "about_player.js",
        "main.js",
        "player_decks.js",
        "splintertools.js",
        "splintertools_api.js",
        "splinterlands_api.js",
        "dialog.js",
        "filter_utils.js",
        "utils.js",
        "access.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "/images/splintertools_icon32.png",
    "/images/splintertools_floppy.png",
    "/images/splintertools_delete.png",
    "/images/splintertools_use.png"
  ],
  "permissions": [
    "https://us-central1-splintertools-825aa.cloudfunctions.net/*",
    "https://api2.splinterlands.com/"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/splintertools_icon16.png",
      "32": "/images/splintertools_icon32.png",
      "48": "/images/splintertools_icon48.png",
      "128": "/images/splintertools_icon128.png"
    }
  },
  "icons": {
    "16": "/images/splintertools_icon16.png",
    "32": "/images/splintertools_icon32.png",
    "48": "/images/splintertools_icon48.png",
    "128": "/images/splintertools_icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d440e0f-c857-434b-8ca7-85bbe51e0607}"
    }
  }
}