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Thunderbird 140.0.1esr freezes during typing text of new messages

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Harold Weller
Harold Weller

Thunderbird pushed out an automatic update last night (July 13 2025) to version 140.0.1esr. Since then I cannot complete creating and typing a new message without Thunderbird freezing completely during entry of the text of a new message. I am running Windows-11 home, version 24h2. I have rebooted, etc. multiple times. I also ran thunderbird in troubleshooting mode and the problem still exists.

Please help - as of today Thunderbird is completely useless to me.

wellerhn@gmail.com

Thunderbird pushed out an automatic update last night (July 13 2025) to version 140.0.1esr. Since then I cannot complete creating and typing a new message without Thunderbird freezing completely during entry of the text of a new message. I am running Windows-11 home, version 24h2. I have rebooted, etc. multiple times. I also ran thunderbird in troubleshooting mode and the problem still exists. Please help - as of today Thunderbird is completely useless to me. wellerhn@gmail.com

Réiteach roghnaithe

Good call Rick. I sometimes forget about that choice, which isn't tested in Thunderbird's Troubleshoot Mode.

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All Replies (6)

Wayne Mery
Wayne Mery
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  • Top 10 Contributor

Sorry you are having trouble.

Please see https://wiki.mozilla.org/Thunderbird:Testing:Memory_Usage_Problems especially #6 (but don't skip the previous steps).

What are your results?

Harold Weller
Harold Weller Úinéir na ceiste

Turning off the status bar as outlined in #6 did not solve the problem.

Harold Weller
Harold Weller Úinéir na ceiste

Image of Task Manager showing memory usage is attached.

sfhowes
sfhowes
  • Top 25 Contributor

Try #3 in the article: run Windows in safe mode to test for the possible, and likely, interference of Norton.

Rick
Rick
  • Top 25 Contributor

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1972457

Possible solution: https://support.mozilla.org/en-US/questions/1514833

Wayne Mery
Wayne Mery
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  • Top 10 Contributor

Réiteach Roghnaithe

Good call Rick. I sometimes forget about that choice, which isn't tested in Thunderbird's Troubleshoot Mode.