Examine source code of OsmWallet

{
  "manifest_version": 2,
  "name": "OsmWallet",
  "description": "An XRP Ledger Wallet in your Browser.",
  "version": "0.0.8",
  "icons": {
    "16": "16.png",
    "32": "32.png",
    "64": "64.png",
    "128": "icon.png",
    "256": "256.png",
    "512": "512.png",
    "1024": "1024.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "16.png",
      "32": "32.png",
      "64": "64.png",
      "128": "icon.png",
      "256": "256.png",
      "512": "512.png",
      "1024": "1024.png"
    },
    "default_popup": "index.html#/popup",
    "default_title": "OsmWallet"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "tabs",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "windows": "Ctrl+Shift+S",
        "mac": "Command+Shift+S",
        "chromeos": "Ctrl+Shift+S",
        "linux": "Ctrl+Shift+S"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{73cf7562-6ffe-4318-9f29-5d373fe43656}"
    }
  }
}