Apps
Old Firefox Pending Crashes
When Firefox crashes on Windows, its Crash Reporter writes a pending report into the Crash Reports\pending folder under the active profile data area. These pending items usually include minidump .dmp files, metadata .extra files, and related submission payloads kept locally until they are sent or discarded; Kudu removes only unsubmitted pending crash reports older than 30 days, leaving recent reports, Firefox settings, bookmarks, passwords, and other personal data untouched.
Why clean Old Firefox Pending Crashes?
- Repeated Firefox or plugin crashes can leave behind many old .dmp and .extra files, so the Crash Reports\pending folder quietly grows and uses disk space even though those reports are no longer useful
- Old pending crash reports from versions you no longer run can clutter the crash queue, making it harder to tell which failures are recent when you inspect Firefox crash reporting folders
- If Firefox was crashing in a loop for days or weeks, dozens of stale pending reports can accumulate, and the only visible symptom may be unexpectedly large AppData usage
- Unsubmitted reports older than a month usually no longer help with current troubleshooting, so cleaning them reduces leftover diagnostic debris without affecting browsing history, saved logins, or profile settings
- Some users back up or sync their AppData folders manually, and a pile of obsolete minidumps makes those copies larger and slower even though the reports will never be submitted
- Keeping only newer pending reports makes current crash investigation cleaner, because you are not sorting through outdated dumps from already fixed crashes or old Firefox builds
What gets cleaned
Cache paths Kudu targets
Windows
%AppData%/Mozilla/Firefox/Crash Reports/pending |
Frequently asked
Common questions about Old Firefox Pending Crashes
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