Firefox Crashes Frequently — about:crashes Troubleshooting

Overview

Firefox crashing repeatedly can be diagnosed using about:crashes to view crash reports and identify the faulting module.

Key Details

• Firefox crash reports are stored locally and optionally sent to Mozilla
• about:crashes lists all recent crash reports with timestamps
• Each crash report identifies the crashing thread and faulting module
• Common crash modules: libxul.so (Linux), xul.dll (Windows), graphics drivers
• Crashes in Safe Mode point to Firefox core issues, not extensions

Common Causes

• Incompatible or buggy extension causing instability
• Outdated GPU driver crashing during hardware acceleration
• Corrupted Firefox profile data
• Insufficient RAM causing process termination
• Firefox version bug (check if crash is known)

Steps

1. 1View crash reports: type about:crashes in the address bar
2. 2Click a crash ID to see details or search it on crash-stats.mozilla.org
3. 3Test in Safe Mode: Help > Troubleshoot Mode — if stable, an extension or theme is the cause
4. 4Disable hardware acceleration: Settings > General > Performance > uncheck 'Use hardware acceleration'
5. 5Create a fresh profile: about:profiles > Create a New Profile — test if crashes stop

Tags

More in Firefox Errors

Frequently Asked Questions