Polyfills check initCustomElements # 1 preloading pre-scripts sentryOnLoad Setup Script Sentry Loader Script Sentry's makeMultiplexedTransport Sentry's moduleMetadataIntegration Add the rest of the ViewerModel renderIndicator versionIndicator used platform apis start used platform apis end Business Manager initCustomElements #2 react react-dom lodash script initial scripts scriptTagsToPreload Old Browsers Deprecation bi bi warmup data start warmup data end presets polyfill detect browser zoom