Starts in safe mode? See https://support.mozilla.org/en-US/kb/safe-mode-thunderbird

Thank you for your answer Wayne. I already tried the safe mode, but that does not help.

What are your other crash IDs?

Hi Wayne,

These are the crash reports. I hope you can help me, because I cannot use my emails anymore.

Thanks, Huib Papenhuijzen

bp-b325df5c-7433-46ed-a0d4-8885e0210125 bp-1b168b44-da07-4fec-8811-ca5f80210125 bp-57db1e4a-a051-46e4-8afa-12e350210125 bp-cfed9d0c-8b6a-4f92-8196-b85420210124 bp-1a71502f-1aa9-4a0d-a039-81afd0210124 bp-aa3258ed-18a9-45f2-a431-4de680210123 bp-f5258659-52ac-4d7f-9ec4-282980210123 bp-8b4f8d96-a8a0-4011-be40-69c250210123 bp-3bd48f4d-1c81-43d1-83b1-0e4170210123 bp-dcd13063-3683-44f3-9803-39a8e0210122 bp-995e8ac5-c4dc-4ef7-99e9-7004c0210121 bp-e694ea54-5a1d-477a-bd30-0c0070210121 bp-d34395ea-35fd-44e0-8af6-ec7f90210121 bp-8704107f-e6f3-4367-b971-55f990210121 bp-8e2e0f75-0120-4e3a-965d-fd4260210120 bp-4acd9417-e3ab-4776-830d-f257b0210120 bp-7db6e725-607d-483d-9019-78ec20210119 bp-6c2221c7-efea-490c-9c01-3edd00210119 bp-0c2f0fa4-8831-49d5-96c8-9a4590210118 bp-59584742-6d1d-4ab6-922e-ada500210118 bp-965dc538-0554-4be2-801f-234d20210116 bp-46e39f72-8ac2-48c1-92f1-273720210116 bp-668e32bb-42d6-49ab-905d-7f2840210116 bp-45ba9be4-baa3-4ff8-870b-aae560210116 bp-21f06a1b-a7e5-4f10-b9e2-cf60d0210116 bp-ab87bd70-f988-4e19-8935-630dc0210116 bp-5b1533d3-6360-4566-8c98-781710210116 bp-996904ad-3446-4f30-8b44-8280d0210116 bp-49c471e5-dc29-42ac-8f9a-697f10210115 bp-1c003d92-1fbb-4707-ab25-082020210115 bp-75664edb-180c-4cf4-992e-6c8f70210115 bp-bea63e7f-5579-417d-bf59-dc2250210115 bp-c90dc1d0-02f3-4bb9-9e72-58d430210114 bp-a522174f-520f-4f11-b49d-fbb7a0210114 bp-14be7265-4028-4d6c-9fb3-96cfe0210114 bp-085e2ef2-18bd-448c-a707-2e8180210114 bp-c23a3574-2edf-45c2-8c2e-336e70210113 bp-489892ad-236e-452e-ba62-7a2ba0210113 bp-f6b7be71-ce9b-42d2-8917-2ae260210113 bp-99605571-a2c1-4fba-b293-60c3c0210113 bp-60d73369-447a-4be5-9a8b-dc3f10210113 bp-37955340-6846-49d4-8704-535270210113 bp-6798863f-1460-418a-9c0c-e6def0210113 bp-fd37755f-031c-4ee0-91eb-24a100210113 bp-af5177b2-1fcb-45fc-9d0a-e3d4e0210113 bp-6c2af2f2-6046-4a86-b277-e675c0210113

Sorry for the delay. Please tell us, are you still crashing??

Most of the crash are @ OOM | large | mozalloc_abort | moz_xmalloc | xul.dll

And I just realized all of those crashes have uptime of 3 minutes 30 seconds. Only a few have different uptimes, like OOM | small which are on the order of 4 minutes or 4 minutes 30 seconds https://crash-stats.mozilla.org/report/index/0c2f0fa4-8831-49d5-96c8-9a4590210118#tab-details

My initial guess, not that I'm confident about, is this is caused by antivirus. Are you running anything other than Windows Defender?

Considerable similarity to https://support.mozilla.org/en-US/questions/1330034 which is shaping up to be, perhaps, Bitdefender

Hi Wayne,

I am not running any antivirus software except the one which is standard installed by Microsoft Windows 10. The crash problem still exists. I hope you can help me, because I cannot work anymore with Thunderbird and I need it every day. Now I am using the web email application, but that has not the functionality of Thunderbird.

Thanks for your continued support,

Bye, Huib.

@hpapenhu are you still crashing?

Yes unfortunately Thunderbird is still crashing. So I decided to transfer to eM Client. That works fine. My emails and contacts from Thunderbird are all recovered through eM Client. It is a pity that Thunderbird does not work anymore.