If you use "Clear history when Firefox closes" then you to disable this feature. You can enable one item at the time to see if you can isolate an item as the culprit.

• Settings -> Privacy & Security
  Firefox will: "Use custom settings for history":
  [X] "Clear history when Firefox closes" -> Settings
• https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox

• clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exceptions for passwords and other website specific data
• clearing "Cookies" will remove all cookies including cookies with an allow exception you may want to keep

bp-a1a5cd34-f9dc-4e80-94c0-e39150210826 bp-7fb90376-80a8-4dc9-a9eb-9395d0210826 bp-3a0005e6-2bed-4076-9b90-51dcd0210826 bp-7cb6c59b-3302-4789-ae02-3b4e00210826

Signature: AsyncShutdownTimeout | Places Clients shutdown | sanitize.js: Sanitize

MOZ_CRASH Reason (Sanitized) : MOZ_CRASH()

Crash Reason EXCEPTION_BREAKPOINT

IPSEng32.dll = Symantec Intrusion Detection

This is for Sumo's Related Bugs 1700584 NEW --- Crash in [@ AsyncShutdownTimeout | Places Clients shutdown | sanitize.js: Sanitize]

1597915 RESOLVED FIXED Crash in [@ AsyncShutdownTimeout | Places Clients shutdown | sanitize.js: Sanitize]

1404105 RESOLVED FIXED Crash in AsyncShutdownTimeout | Places Clients shutdown | sanitize.js: Sanitize,sanitize.js: Sanitize on shutdown

Bug 1700584 Opened 5 months ago Updated 5 months ago A majority of these are on history: blocking, so clearing browsing history on shutdown.

Do you have the browser set to clear history?

None of this worked. Didn't fix issue.

You can try to exclude clearing "Form & Search History" in "Clear history when Firefox closes".

• Settings -> Privacy & Security
  Firefox will: "Use custom settings for history":
  [X] "Clear history when Firefox closes" -> Settings

Locking this thread.
Please continue here: [/questions/1348731]