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Thunderbird keeps freezing up without crash report

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  • Nuɖoɖo mlɔetɔ Mapenzi
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nils28
nils28

Good morning

Since this morning (05/03/2026) Thunderbird freezes within a minute or two of opening the program.

Everything in the program freezes up. I cannot even close it.

I am running Version 140.8.0esr on a Windows 10 PC.

Initially I was getting a pop up warning message that ask me to confirm if I wanted to send an email with attachments of over 20 MB. There were 3 or 4 such messages. I had not tried to send such emails.

I checked the Outbox in Local folders for old messages, but it was empty. I also checked the Unsent messages files in Local Folders in the Profile folder. I deleted the Unsent Messages.msf file to no effect. I renamed and replaced the Unsent messages file. Also no change.

I checked for crash logs but there are none.

I have run out of ideas as to what to try next. Does anyone have any advice?

Good morning Since this morning (05/03/2026) Thunderbird freezes within a minute or two of opening the program. Everything in the program freezes up. I cannot even close it. I am running Version 140.8.0esr on a Windows 10 PC. Initially I was getting a pop up warning message that ask me to confirm if I wanted to send an email with attachments of over 20 MB. There were 3 or 4 such messages. I had not tried to send such emails. I checked the Outbox in Local folders for old messages, but it was empty. I also checked the Unsent messages files in Local Folders in the Profile folder. I deleted the Unsent Messages.msf file to no effect. I renamed and replaced the Unsent messages file. Also no change. I checked for crash logs but there are none. I have run out of ideas as to what to try next. Does anyone have any advice?

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Mapenzi
Mapenzi
  • Top 10 Contributor

Freezes most times don't produce crash reports, unless they terminate in a crash. Did you try to start Thunderbird in 'troubleshoot mode'? Hold down the Shift key whilst launching TB.... https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbird

Bia biabia

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