OpenTelemetry (OTeL) provides a robust framework for monitoring browser applications by collecting telemetry data such as logs, traces, and metrics, offering insights into performance and behavior through tools, APIs, and SDKs. While traditionally used on the server side, OTeL's browser instrumentation is highlighted for its ability to connect client and server traces, offering a comprehensive view of application performance by tracking document load performance, user interactions, and network requests. Highlight's JavaScript SDK seamlessly integrates with OpenTelemetry to facilitate this process, allowing developers to automatically or manually instrument client-side applications and create end-to-end traces. This connection enhances end-to-end visibility, performance optimization, and error correlation, providing an opportunity to address bottlenecks and improve user experience. The integration facilitates visualization of traces within Highlight's UI, enabling detailed analysis of user interactions, resource timings, and web vitals, ultimately supporting performance optimization efforts and delivering exceptional web applications.