How to Debug Production Issues with Session Replay
"It works on my machine." Every developer has said it. Every developer has heard it. And every developer knows the frustration of trying to debug an issue that only happens in production, with nothing but a vague user report: "The button doesn't work."
Session replay changes this completely. Instead of playing detective with incomplete information, you get a video recording of exactly what the user did, combined with console logs, network requests, and error stack traces. Everything you need to reproduce and fix the bug.
Why Traditional Bug Reports Fall Short
When a user encounters an issue, they typically report it like this:
- "I clicked submit and nothing happened"
- "The page is broken"
- "I got an error message"
This tells you something went wrong, but not what, when, or why. You are left guessing:
- Which browser were they using?
- What data did they enter?
- Did a network request fail?
- Was there a JavaScript error?
- What was the exact sequence of actions?
You could ask for screenshots, browser console logs, and step-by-step instructions — but most users do not know how to provide these, and even when they do, critical context is missing.
How Session Replay Solves This
With UX Replay, every user interaction is automatically recorded:
Visual Playback — Watch exactly what the user saw and did, frame by frame. See which buttons they clicked, which forms they filled, and where the failure occurred.
Console Logs — Every console.log, warning, and error is captured in context. See what was logged right before the issue happened.
Network Activity — Failed API calls, slow responses, and 404 errors are all recorded. Know immediately if the backend was the problem.
Error Stack Traces — JavaScript errors are captured with full stack traces, making it trivial to identify the source file and line number.
User Actions Timeline — See the exact sequence: "User clicked Login → API call failed → Error modal appeared."
Real-World Example: The Invisible Form Bug
A SaaS company was getting reports that their signup form "wasn't working." Users would fill it out, click submit, and nothing happened. Support tickets were piling up, but developers could not reproduce it.
They installed UX Replay and asked the next affected user to share their session. Within 60 seconds of watching the replay, they spotted the issue:
- User filled out the form correctly
- User clicked Submit
- A network request was sent to
/api/signup - The API returned a validation error: "Email already exists"
- But the error message never displayed — it was hidden by a z-index bug in the CSS
Without session replay, this would have required hours of back-and-forth with users, browser testing, and guesswork. With it, the bug was identified and fixed in minutes.
Setting Up Session Replay in 5 Minutes
Getting started with session replay is straightforward:
- Install the extension — UX Replay is a Chrome extension. No SDK, no code changes required for basic recording.
- Start recording — Click the extension icon and hit "Record." It captures everything until you stop.
- Trigger the bug — Reproduce the issue or have a user do it.
- Get an AI bug report — Click "Analyze with AI" and get a structured bug report in 60 seconds, complete with suspected root cause and steps to reproduce.
- Share the session — Generate a shareable link to send to your team or attach to a Jira ticket.
For production monitoring, you can integrate the UX Replay SDK to auto-record sessions for all users (with privacy masking for sensitive fields).
Privacy and Security
Session replay raises an obvious question: Is it safe to record everything?
UX Replay handles this carefully:
- Password fields are auto-masked — Never recorded, ever.
- Custom masking rules — Mark any element as sensitive (credit cards, SSNs, etc.) and it will be redacted.
- No PII by default — You control what gets recorded. For public apps, enable recording opt-in.
- Self-hosted option — Host your own replay server if you need complete data control.
Beyond Bug Reports: Other Use Cases
While debugging is the primary use case, session replay is also valuable for:
User Experience Research — See how real users navigate your app. Where do they get confused? Where do they drop off?
Customer Support — Instead of asking users to explain what happened, just watch the replay. Reduce support ticket resolution time by 50%.
Onboarding Optimization — Watch new users go through onboarding. Identify where they struggle and optimize the flow.
Feature Validation — After shipping a new feature, watch real users interact with it. Are they using it as intended?
Start Recording Sessions Today
The next time a user reports "something is broken," imagine being able to see exactly what they saw, exactly what they did, and exactly what went wrong — all in under 60 seconds.
That is the power of session replay.
Install UX Replay and start capturing production issues with full context. The free tier includes 10 recordings per month. For teams, check out our Pro plan with unlimited recordings and AI-powered bug analysis.
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