Examine source code of Ferz Wallet

{
  "name": "Ferz Wallet",
  "short_name": "Ferz Wallet",
  "manifest_version": 2,
  "description": "FERZ is user friendly, decentralised, crypto wallet. FERZ is powered by Thorchain protocol, allowing you to swap assets supported by Thorchain with no KYC or assets custody. Provide liquidity with your unproductive assets (such as BTC, BCH, XRP) and earn passive income of 30%-80% APY.",
  "version": "0.0.8",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "icons": {
    "36": "/img/icons/android-chrome-36x36.png",
    "48": "/img/icons/android-chrome-48x48.png",
    "72": "/img/icons/android-chrome-72x72.png",
    "96": "/img/icons/android-chrome-96x96.png",
    "144": "/img/icons/android-chrome-144x144.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4136ebe-890e-493d-9caa-0dc9ae69e3e4}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://app.ferz.com/*"
      ],
      "js": [
        "message.js"
      ]
    }
  ]
}