Examine source code of LTI Debugger

{
  "manifest_version": 2,
  "name": "LTI Debugger",
  "description": "View & Debug LTI launches",
  "version": "0.0.4",
  "icons": {
    "16": "icons/lti-debugger-icon16.png",
    "32": "icons/lti-debugger-icon32.png",
    "48": "icons/lti-debugger-icon48.png",
    "128": "icons/lti-debugger-icon128.png"
  },
  "devtools_page": "devtools-page.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{d44c9231-37cf-4172-a616-aaaec45f5cbc}"
    }
  }
}