Product Firefox Release Channel release Version 90.0.2 Build ID 20210721174149 (2021-07-21) Buildhub data OS Windows 10 OS Version 10.0.19043

Tue, 27 Jul 2021 12:48:56 GMT bp-800e2379-d8dd-4ec2-9d33-b23a50210727 Signature: je_free | mozilla::UntrustedModulesProcessor::ProcessModuleLoadQueue

Uptime 2 seconds

MOZ_CRASH Reason (Sanitized) : MOZ_RELEASE_ASSERT((mapelm->bits & ((size_t)0x01U)) != 0) (Double-free?)

Crash Reason EXCEPTION_BREAKPOINT

Do you have any other crash reports?

What were you doing at the time? surfing, watching a clip, reading something . . . .

Start Firefox using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?