Examine source code of Live Price Overlay

{
  "manifest_version": 2,
  "name": "Live Price Overlay",
  "version": "14",
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://setinrate.com/room",
        "https://www.saringold.com/user/trading/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "farazcanceller@omidhosseini.dev"
    }
  }
}