Examine source code of SQRL

{
  "name": "__MSG_name__",
  "description": "__MSG_description__",
  "default_locale": "en",
  "manifest_version": 2,
  "version": "0.0.56",
  "homepage_url": "https://github.com/Jaaap/SQRL",
  "applications": {
    "gecko": {
      "id": "sqrl@pass.dog"
    }
  },
  "icons": {
    "256": "icons/256.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "https://*/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src data: 'self'",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/256.png",
    "default_title": "SQRL",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "bn.js",
      "utils.js",
      "background.js",
      "sodium-asmjs.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      }
    }
  }
}