bp-ff41766f-42cc-4dd4-a003-eea110221221 is a startup crash @ strlen | JS_AtomizeString with no matching bug report.

Please post your other crash IDs from Help Troubleshoot info.

other crash IDs: bp-e3a344fa-09d3-46f6-aadd-5513f0221221 bp-a4efca10-c7ee-44e0-bc07-daba30221221 bp-2d9ac97a-db92-474c-b56f-7f4680221221 bp-f18ce31d-921e-4d66-9c1e-810e90221221 bp-15f7d3da-c234-4248-9aa0-3a9d20221220 bp-a7b79175-e2ce-4064-bf93-39a7a0221220 bp-9fa659de-ed61-4871-8c1b-b4d3a0221220 bp-a6967c9a-2a19-495a-83d8-5a21d0221220 bp-18631a02-09b0-41d5-b50d-808e90221220 bp-ed15e607-9bff-4ed8-9bd0-e06470221219 bp-ad24c5a3-3c46-466e-90a9-c2cb30221219

All of these crash reports are from mid-December. You haven't had crashes in the last two weeks?

Have you tried Windows started in safe mode?

Also, the crash signatures vary, which potentially suggests the cause is not Thunderbird but some external program.

Last Drop bp-95f928d3-f262-434c-add7-a09660230106 In safe mode do not connect to my server, so do not check the mail. How can I find out which program is disrupting mail?

Some possibilities:

• your antivirus software
• the keyboard? program associated with KBDRU.DLL
• any other software you have installed on windows that starts at Windows boot

alwonderland,

If you still crash, please post a new support topic using https://support.mozilla.org/en-US/questions/new/thunderbird