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Why is Firefox constantly crashing? 40.0.2

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Ever since the update to 40.0.2, I'm getting constant crashing on both Windows 7 and Windows 10. It's absolutely unbearable. These are a few of my recent crash report IDs, though this is not nearly all of them. What is going on???

bp-33fda917-12a6-4e6b-a160-03f1b2150823 bp-b3384e91-7275-42d7-9cba-fa7592150821 bp-59839c56-d55e-4a0a-96ca-6cecf2150819 bp-3709af2b-27ff-4232-96d9-1f6682150811 bp-d3b3caa7-6ca7-4aba-8c98-fd25d2150811

Ever since the update to 40.0.2, I'm getting constant crashing on both Windows 7 and Windows 10. It's absolutely unbearable. These are a few of my recent crash report IDs, though this is not nearly all of them. What is going on??? bp-33fda917-12a6-4e6b-a160-03f1b2150823 bp-b3384e91-7275-42d7-9cba-fa7592150821 bp-59839c56-d55e-4a0a-96ca-6cecf2150819 bp-3709af2b-27ff-4232-96d9-1f6682150811 bp-d3b3caa7-6ca7-4aba-8c98-fd25d2150811

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The crash report flagged these programs;

Signature OOM OutOfMemory

sysfer.dll = Symantec CMC Firewall

IPSEng32.dll = Symantec Intrusion Detection

IPSLdr32.dll = Symantec Intrusion Detection ++++++++++++++++++++++ Total Virtual Memory 2147352576

Available Virtual Memory 375373824

System Memory Use Percentage 85

Available Page File 2831945728

Available Physical Memory 488751104

OOM Allocation Size 3374055

This is for Sumo's Related Bugs

1156255 NEW --- crash in OOM | large | NS_ABORT_OOM(unsigned int) | nsSimpleURI::SetPath(nsACString_internal const&)


Firefox uses too much memory (RAM) - How to fix This article describes how to make Firefox use less memory to make it run faster and prevent crashes.

https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding

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These reports range from 73% to 88% system memory in use, which is dicey territory for Firefox, which likes to use a lot of memory.

Are there particular sites or types of content that seem to trigger this problem for you?