Showing questions for topic:

Thunderbird will not open on iMac - the wheel of death keeps spinning on all areas of the window.

Thunderbird comes up as not responding - tab names appear but he last tab is constantly trying to open. This began about 2.00pm Tuesday 15th September. Shutting down &… (gụkwuo)

Thunderbird comes up as not responding - tab names appear but he last tab is constantly trying to open. This began about 2.00pm Tuesday 15th September. Shutting down & restarting has no effect - please help!! Brian

Open 1

frequent crashes. on Linux

Hello all, thank you in advance for your time. I've got a Lenovo running Linux (Zorin, an Ubuntu branch) Crashes have been more and more frequent over the last couple wee… (gụkwuo)

Hello all, thank you in advance for your time. I've got a Lenovo running Linux (Zorin, an Ubuntu branch)

Crashes have been more and more frequent over the last couple weeks. Usually it closes only Firefox, sometimes it throws me back to the login screen, and rarely the computer crashes entirely. I've been trying to pin down the source of the crashes -- it hasn't only been Firefox, but most of the crashes are while FF is open.

THIS tab keeps crashing, as I type.

It seems to happen more often when I'm watching video.

Here are all the crash IDs within the last 24 hours: bp-dfb0bd40-4ce6-41bd-b9cb-ad0510260913 13/09/2026, 11:15 View bp-50a8400a-3439-4af4-b5c7-6e60f0260913 13/09/2026, 11:15 View bp-0893e979-6a06-40cc-ad0b-757210260913 13/09/2026, 11:15 View bp-8a1bbc36-9c1d-412c-a2cf-c4c040260913 13/09/2026, 11:15 View bp-4c97e699-dee7-470f-9f82-855760260913 13/09/2026, 11:15 View bp-4526b2af-908a-45be-89ae-293ef0260913 13/09/2026, 11:08 View bp-60af27d7-aeef-4761-b86e-7595a0260913 13/09/2026, 11:08 View bp-25b42dd1-3f54-4be4-bde7-801f60260913 13/09/2026, 11:08 View bp-e92ad4f9-b7d3-453e-8c5a-066910260913 13/09/2026, 11:08 View bp-d19f0c4c-9eb7-45d1-a7e7-978d90260913 13/09/2026, 11:08 View bp-b212719f-1daa-459c-8491-2c6cb0260913 13/09/2026, 11:08 View bp-9effc3ad-0b73-43d2-839c-805a00260913 13/09/2026, 11:08 View bp-7e5b6de1-7a84-48ad-86c0-e07510260913 13/09/2026, 11:08 View bp-271c4c4f-9f81-480a-9815-5f5bf0260913 13/09/2026, 11:08 View bp-956cef3e-25a1-4a8c-b7e1-668be0260913 13/09/2026, 11:08 View bp-92a596e6-edc8-4920-9365-6e3e00260913 13/09/2026, 11:08 View bp-6e309137-bf0a-4ee1-8ddf-492b20260913 13/09/2026, 11:08 View bp-d3eadcae-1967-4c31-856f-284f80260913 13/09/2026, 11:08 View bp-e319008d-d7e3-4354-95db-846e10260913 13/09/2026, 11:08 View bp-ce80cf98-4aad-46ee-a2a2-40ccf0260913 13/09/2026, 11:08 View bp-41734b4e-09d0-4dfe-ab7a-c74400260913 13/09/2026, 11:08 View bp-37752c09-a2ae-4f35-8ee6-62ee60260913 13/09/2026, 11:08 View bp-01aed5a5-d3da-4551-9646-eb73d0260913 13/09/2026, 11:08 View bp-0d52d173-f46d-4d5c-b723-441930260913 13/09/2026, 11:08 View bp-5a9507dd-21f3-4be3-8d68-ad70f0260913 13/09/2026, 11:08 View bp-0a5b5b7c-6400-41f7-ba67-c881b0260913 13/09/2026, 11:08 View bp-2ff2f687-e231-4ac5-925a-fde060260913 13/09/2026, 11:08 View bp-1c9a1836-3ebe-40bd-ac76-182850260913 13/09/2026, 11:08 View bp-f4bbc332-be5c-48f7-8e6e-c008a0260913 13/09/2026, 11:08 View bp-807e438c-9bb1-4056-b67b-48e870260913 13/09/2026, 11:08 View bp-b422a84c-4096-4ab8-926c-d63030260913 13/09/2026, 11:08 View bp-9740f00f-a1ac-4fce-96b3-704940260913 13/09/2026, 11:08 View bp-0a571a75-602f-4802-98df-22ee30260913 13/09/2026, 11:08 View bp-5f7a41ac-f92a-42b3-96bc-6dda70260913 13/09/2026, 11:08 View bp-d81a88f6-3da4-4e15-8669-352390260913 13/09/2026, 11:08 View bp-324a6102-496b-4724-9deb-3532f0260913 13/09/2026, 11:08 View bp-40969791-0669-4158-abd6-b57230260913 13/09/2026, 11:08 View bp-7b5c8e37-6cfe-4027-9bd1-fc0d80260913 13/09/2026, 11:08 View bp-62dbac62-1feb-47a6-be53-bd8b10260913 13/09/2026, 11:08 View bp-9197029c-0719-4294-bc37-e7f320260913 13/09/2026, 11:08 View bp-941d7f54-5b2e-4783-83f2-66c330260913 13/09/2026, 11:08 View bp-00202476-8680-4295-8a76-a97db0260913 13/09/2026, 11:08 View bp-027dfa8e-f3e1-44e9-a405-1ae350260913 13/09/2026, 11:08 View bp-369f58c9-4456-4578-977e-49cfe0260913 13/09/2026, 11:08 View bp-78c25147-3a9c-4ad8-9210-eb0ca0260913 13/09/2026, 11:07 View bp-f1f4b2b3-0885-4259-8dd3-bfa700260913 13/09/2026, 11:07 View bp-72d20621-92ea-417a-b063-deba40260913 13/09/2026, 11:07 View bp-721a4c72-ab3c-4ea0-8428-72b6d0260913 13/09/2026, 11:07 View bp-ffb02689-cb96-48e2-ab89-1c7f10260913 13/09/2026, 11:07 View bp-407b7ac2-8d4c-404d-974a-96d790260912 13/09/2026, 0:37 View bp-9decd8ef-b380-4bfe-8264-6841b0260911 11/09/2026, 22:40 View bp-c9a8eae8-8723-48ba-aab0-48db10260908 08/09/2026, 22:57 View bp-e0ac525c-a6c7-4af5-abe8-0ab5e0260913 13/09/2026, 11:16 View bp-91be494d-2e41-42b7-9330-e49630260913

Open 7

Firefox newer than 132.0.2 always crashes tabs on startup

Hello, I have been unable to update Firefox past 132.0.2; every time I download an update and install/restart, all tabs automatically crash upon loading regardless of the… (gụkwuo)

Hello,

I have been unable to update Firefox past 132.0.2; every time I download an update and install/restart, all tabs automatically crash upon loading regardless of the website. I can load local pages like settings or about:config, but anything that actually uses the internet goes straight to crashing (including sites as simple as google.com). I have tried restarting in Troubleshooting mode to no avail. There are no crash reports when I pull up about:crashes, so unable to post IDs here.

It is not an internet access problem (I am [unfortunately] filling out this form from Edge), and with reversion to 132.0.2 everything moves along hunky-dory. I am also able to use the newest version of Firefox on all of my work devices, so it appears to be something in particular with my person PC. Problem occurred with both Windows 10 and Windows 11.

Any help would be much appreciated- I didn't mind an older version of Firefox that worked, but there have been some MFA logons that refuse to go load in v132 so it's becoming something I'm less able to ignore now. TIA

Open 7

When I try to start Thunderbird on my Windows 11 laptop it does not start properly.

When I try to start Thunderbird on my Windows 11 laptop it does not start properly It is haging ond after a whike i get a message that thunderbird does not respond ("sva… (gụkwuo)

When I try to start Thunderbird on my Windows 11 laptop it does not start properly It is haging ond after a whike i get a message that thunderbird does not respond ("svarar inte" in swedish). Sometimes if I try to reinstall Thunderbird it starts up, But today nothing happens.

Open 1

Thunderbird freezes after startup. I tried restarting, Troubleshoot Mode, and both “default” and “default-esr” profiles, but the issue remains. Please advise how to fix this without losing my emails. This is affecting my work and needs urgent resolution.

Additional details: Operating system: Windows (please specify your Windows version if known) The issue started on August 25, 2026. Thunderbird becomes unresponsive sh… (gụkwuo)

Additional details:

  • Operating system: Windows (please specify your Windows version if known)
  • The issue started on August 25, 2026.
  • Thunderbird becomes unresponsive shortly after startup.
  • A “System Integration” prompt appears before Thunderbird becomes unresponsive.
  • I cannot click any buttons once Thunderbird becomes unresponsive.
  • I tested both available profiles (“default” and “default-esr”) using the Profile Manager, but the same issue occurred with both profiles.
  • I also started Thunderbird in Troubleshoot Mode with all add-ons disabled, but the issue still occurred.
  • I can force-close Thunderbird through Windows when it becomes unresponsive.
  • I have not deleted or modified any Thunderbird profile files because I want to avoid losing existing email data.
  • The profile containing my email data appears to be “default-esr”.

I would appreciate any guidance on how to identify the cause of this issue and restore Thunderbird without losing my existing emails.

Open 1

When trying to open Thunderbird it does nt with the message "Thunderbird Not Responding"

When trying to open Thunderbird it does nt with the message "Thunderbird Not Responding" I try to open in Troubleshoot mode but that does not wotk either. I have to start… (gụkwuo)

When trying to open Thunderbird it does nt with the message "Thunderbird Not Responding" I try to open in Troubleshoot mode but that does not wotk either. I have to start and re start the laptop and finally after many tries it finally opens. Frustrating

Open 1

Thunderbird v22.0 crashes on start on Android 12

Hello, Thunderbird and K9Mail crash when opened on Android 12 (custom ROM). I can't submit to GitHub (no account there). ``` type: crash osVersion: [redacted] package: co… (gụkwuo)

Hello, Thunderbird and K9Mail crash when opened on Android 12 (custom ROM). I can't submit to GitHub (no account there).

``` type: crash osVersion: [redacted] package: com.fsck.k9:39043 process: com.fsck.k9 processUptime: 299 ms

java.lang.RuntimeException: Unable to create application app.k9mail.K9App: org.koin.core.error.InstanceCreationException: Could not create instance for '[Singleton: 'com.fsck.k9.controller.MessagingController',binds:app.k9mail.legacy.message.controller.MessagingControllerRegistry]' at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6773) at android.app.ActivityThread.access$1500(ActivityThread.java:257) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2092) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7876) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1019) Caused by: org.koin.core.error.InstanceCreationException: Could not create instance for '[Singleton: 'com.fsck.k9.controller.MessagingController',binds:app.k9mail.legacy.message.controller.MessagingControllerRegistry]' at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:162) at org.koin.core.instance.SingleInstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:5) at org.koin.core.instance.SingleInstanceFactory.get(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolveFromContext(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:131) at org.koin.core.scope.Scope.resolveInstance(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolve(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:55) at net.thunderbird.app.common.BaseApplication$special$$inlined$inject$default$1.invoke(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:124) at kotlin.SynchronizedLazyImpl.getValue(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:21) at app.k9mail.K9App.onCreate(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:324) at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1228) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6768) ... 9 more Caused by: org.koin.core.error.InstanceCreationException: Could not create instance for '[Singleton: 'com.fsck.k9.backend.BackendManager']' at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:162) at org.koin.core.instance.SingleInstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:5) at org.koin.core.instance.SingleInstanceFactory.get(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolveFromContext(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:131) at org.koin.core.scope.Scope.resolveInstance(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolve(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:55) at com.fsck.k9.account.KoinModuleKt$$ExternalSyntheticLambda1.invoke(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:571) at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:39) ... 19 more Caused by: org.koin.core.error.InstanceCreationException: Could not create instance for '[Singleton: 'com.fsck.k9.backends.DefaultImapBackendFactory']' at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:162) at org.koin.core.instance.SingleInstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:5) at org.koin.core.instance.SingleInstanceFactory.get(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolveFromContext(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:131) at org.koin.core.scope.Scope.resolveInstance(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolve(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:55) at com.fsck.k9.account.KoinModuleKt$$ExternalSyntheticLambda1.invoke(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:1306) at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:39) ... 26 more Caused by: org.koin.core.error.InstanceCreationException: Could not create instance for '[Singleton: 'com.fsck.k9.mail.store.imap.IdleRefreshManager']' at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:162) at org.koin.core.instance.SingleInstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:5) at org.koin.core.instance.SingleInstanceFactory.get(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolveFromContext(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:131) at org.koin.core.scope.Scope.resolveInstance(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolve(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:55) at com.fsck.k9.account.KoinModuleKt$$ExternalSyntheticLambda1.invoke(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:1179) at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:39) ... 33 more Caused by: org.koin.core.error.InstanceCreationException: Could not create instance for '[Singleton: 'com.fsck.k9.backends.AndroidAlarmManager']' at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:162) at org.koin.core.instance.SingleInstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:5) at org.koin.core.instance.SingleInstanceFactory.get(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolveFromContext(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:131) at org.koin.core.scope.Scope.resolveInstance(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:16) at org.koin.core.scope.Scope.resolve(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:55) at com.fsck.k9.account.KoinModuleKt$$ExternalSyntheticLambda1.invoke(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:1079) at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:39) ... 40 more Caused by: java.lang.RuntimeException: Permission com.fsck.k9.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION is required by your application to receive broadcasts, please add it to your manifest at androidx.room.util.DBUtil$$ExternalSyntheticBUOutline0.m(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:43) at androidx.tracing.TraceApi29Impl.obtainAndCheckReceiverPermission(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:72) at androidx.datastore.core.Api26Impl.registerReceiver(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:6) at androidx.tracing.TraceApi29Impl.registerReceiver(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:45) at com.fsck.k9.backends.AndroidAlarmManager.<init>(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:65) at com.fsck.k9.account.KoinModuleKt$$ExternalSyntheticLambda1.invoke(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:1127) at org.koin.core.instance.InstanceFactory.create(r8-map-id-3c280bf5980d98748255d4a2c4793d4cc6f0ffa66b7a61c37728be20735925b9:39) ... 47 more

```

Open 1

Thunderbird not responding, reinstall/safe mode not helping (win11)

After a reboot and Windows 11 update today, Thunderbird (I believe it was v155) will not open. It asks for the password, then sits at [Not Responding]. I have copied my p… (gụkwuo)

After a reboot and Windows 11 update today, Thunderbird (I believe it was v155) will not open. It asks for the password, then sits at [Not Responding].

I have copied my profiles (there are two, one dated 2023 with only a 1K .json file in it, and one created tonight while I was troubleshooting that's several GB and when copying, appears to contain all my mail folders although I can't access them directly from within the profile) to a separate location (my desktop).

I've tried the following (after checking previous questions here in Mozilla support):

(1) booting Windows into safe mode

(2) opening Thunderbird in Troubleshooting mode (Shift while opening), both in Windows safe mode and normal boot

(3) uninstalled Thunderbird from Control Panel, downloaded and installed a new copy of Thunderbird

All give the same result: "not responding", can't click anything. Can only wait or close.

I was able to disable an extension that I installed yesterday that had been working fine.

I'm also wondering if the problem is mail folders that are too large. I have some candidates for deletion but since I can't see any .msf files for them, I can't delete (because I can't open Thunderbird.

I'm leery of instructions to outright delete any Thunderbird folders/files because (1) I can't see my mail folders directly and (2) I'm self-employed and all my client and business emails are in there. Losing them woud be a disaster.

I'm tempted to try the Windows option of restoring my entire computer to an earlier point, say, this morning. But that seems like possible overkill if it's an issue with just Thunderbird.

I'm freaking out, please help!

Open 5 1

Mozilla thunderbird is not responding to attemps to log into my email Has been happening every couple days, happening now. HELP

When I close down the non-functional thunderbird basic frame, it says it is reporting the problem to Microsoft. I never know if/when the mail is going to work. No u… (gụkwuo)

When I close down the non-functional thunderbird basic frame, it says it is reporting the problem to Microsoft. I never know if/when the mail is going to work. No useful information on what to do to fix. - Dwight

Open 1

Mozilla Thunderbird stopped responding

Mozilla Thunderbird stopped responding, tried to shut down, restart, uninstall and install - nothing helps Still opens the window, but no messages white backgoround and (… (gụkwuo)

Mozilla Thunderbird stopped responding, tried to shut down, restart, uninstall and install - nothing helps Still opens the window, but no messages white backgoround and (Not Responding)

Open 4 1

Thunderbird 155.0 crashes when launching on macOS, even in Safe Mode

I run Thunderbird on MacOS for some years without a problem. Now, after a hard reboot, Thunderbird won't launch anymore. I tried reinstalling to no avail. Is there anythi… (gụkwuo)

I run Thunderbird on MacOS for some years without a problem. Now, after a hard reboot, Thunderbird won't launch anymore. I tried reinstalling to no avail. Is there anything I could do here? Or do you need any more info? The crash report is as follows:



Translated Report (Full Report Below)


Process: thunderbird [8297] Path: /Applications/Thunderbird.app/Contents/MacOS/thunderbird Identifier: org.mozilla.thunderbird Version: 155.0 (15526.8.28) Code Type: X86-64 (Native) Parent Process: launchd [1] User ID: 501

Date/Time: 2026-09-09 13:49:46.3562 +0200 OS Version: macOS 15.0.1 (24A348) Report Version: 12 Anonymous UUID: A83FED70-635C-4178-5B0E-2FB36A313750

Sleep/Wake UUID: 9CEF8430-EEF8-43BB-AC16-8A9FF7407F51

Time Awake Since Boot: 25000 seconds Time Since Wake: 7284 seconds

System Integrity Protection: enabled

Crashed Thread: 0 MainThread Dispatch queue: com.apple.main-thread

Exception Type: EXC_GUARD (SIGKILL) Exception Codes: GUARD_TYPE_MACH_PORT Exception Codes: 0x0000000000000203, 0x0000000000000000

Termination Reason: Namespace GUARD, Code 2305843146652647939

Thread 0 Crashed:: MainThread Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x7ff815680e0e mach_msg2_trap + 10 1 libsystem_kernel.dylib 0x7ff81568f622 mach_msg2_internal + 84 2 libsystem_kernel.dylib 0x7ff815687f16 mach_msg_overwrite + 649 3 libsystem_kernel.dylib 0x7ff8156810ff mach_msg + 19 4 XUL 0x2f9aca7f4 0x2f35dd000 + 105830388 5 XUL 0x2f9ac4183 0x2f35dd000 + 105804163 6 XUL 0x2f9ac2884 0x2f35dd000 + 105797764 7 XUL 0x2f865b45b 0x2f35dd000 + 84403291 8 XUL 0x2f8685615 0x2f35dd000 + 84575765 9 XUL 0x2f868d2af 0x2f35dd000 + 84607663 10 XUL 0x2f868d80f 0x2f35dd000 + 84609039 11 thunderbird 0x10d03ab2a 0x10d03a000 + 2858 12 dyld 0x7ff8153342cd start + 1805

Thread 1:: AsyncSignalControlThread 0 libsystem_kernel.dylib 0x7ff81568187a read + 10 1 XUL 0x2f825612a 0x2f35dd000 + 80187690 2 XUL 0x2f82560dd 0x2f35dd000 + 80187613 3 libsystem_pthread.dylib 0x7ff8156c2253 _pthread_start + 99 4 libsystem_pthread.dylib 0x7ff8156bdbef thread_start + 15

Thread 2:: RegisterFonts 0 CoreFoundation 0x7ff81573a759 CFStringGetCharacters + 98 1 CoreFoundation 0x7ff815803d71 CFURLCreateFilePathURL + 1086 2 libFontRegistry.dylib 0x7ff81e9c2201 TLocalFontRegistryImp::RegisterFont(__CFURL const*, __CFDictionary const*, unsigned int, unsigned int, __CFError**) const + 459 3 libFontRegistry.dylib 0x7ff81e9c2c32 TLocalFontRegistryImp::RegisterFonts(__CFArray const*, __CFDictionary const*, unsigned int, unsigned int, __CFArray const**, __CFArray const**, __CFArray const**) const + 182 4 libFontRegistry.dylib 0x7ff81e9de0ff XTRegisterFonts2 + 701 5 CoreText 0x7ff817d6db29 _CTFontManagerRegisterActionFontsForURLs(__CFArray const*, CTFontManagerScope, bool, Action, __CFArray const**) + 339 6 CoreText 0x7ff817d6eef7 _CTFontManagerRegisterActionFontURLs(__CFArray const*, CTFontManagerScope, bool, Action, URLTrust, __CFArray const*, bool (__CFArray const*, bool) block_pointer) + 42 7 XUL 0x2f4b40609 0x2f35dd000 + 22427145 8 XUL 0x2f4b5deba 0x2f35dd000 + 22548154 9 libnss3.dylib 0x2da8bb369 0x2da709000 + 1778537 10 libsystem_pthread.dylib 0x7ff8156c2253 _pthread_start + 99 11 libsystem_pthread.dylib 0x7ff8156bdbef thread_start + 15

Thread 3: 0 libsystem_pthread.dylib 0x7ff8156bdbcc start_wqthread + 0

Thread 4: 0 libsystem_kernel.dylib 0x7ff815680e0e mach_msg2_trap + 10 1 libsystem_kernel.dylib 0x7ff81568f622 mach_msg2_internal + 84 2 libsystem_kernel.dylib 0x7ff815687f16 mach_msg_overwrite + 649 3 libsystem_kernel.dylib 0x7ff8156810ff mach_msg + 19 4 XUL 0x2f9aca16d 0x2f35dd000 + 105828717 5 XUL 0x2f9acaeac 0x2f35dd000 + 105832108 6 XUL 0x2f9acad91 0x2f35dd000 + 105831825 7 XUL 0x2fb206fa9 0x2f35dd000 + 130195369 8 libsystem_pthread.dylib 0x7ff8156c2253 _pthread_start + 99 9 libsystem_pthread.dylib 0x7ff8156bdbef thread_start + 15

Thread 5: 0 libsystem_pthread.dylib 0x7ff8156bdbcc start_wqthread + 0


Thread 0 crashed with X86 Thread State (64-bit):

 rax: 0x000000001000000a  rbx: 0x00000002db928340  rcx: 0x00007ff7b2ec4af8  rdx: 0x0000003480000013
 rdi: 0x00000002db928340  rsi: 0x0000000400000011  rbp: 0x00007ff7b2ec4b60  rsp: 0x00007ff7b2ec4af8
  r8: 0x0000000000000000   r9: 0x0000000000000001  r10: 0x0000000000002303  r11: 0x0000000000000206
 r12: 0x00000000000007d0  r13: 0x0000000400000011  r14: 0x0000000000000000  r15: 0x0000000000000001
 rip: 0x00007ff815680e0e  rfl: 0x0000000000000206  cr2: 0x0000000000000000
 

Logical CPU: 0 Error Code: 0x0100002f Trap Number: 133


Binary Images:

      0x10d03a000 -        0x10d042fff org.mozilla.thunderbird (155.0) <4c4c4439-5555-3144-a100-2f79b5ba51e1> /Applications/Thunderbird.app/Contents/MacOS/thunderbird
      0x10d168000 -        0x10d1dcfff libmozglue.dylib (*) <4c4c4442-5555-3144-a1b2-7d8d2d6587df> /Applications/Thunderbird.app/Contents/MacOS/libmozglue.dylib
      0x10d077000 -        0x10d083fff com.apple.CoreWiFi (1.0) <c356ba94-c112-3326-9011-74fc0bb4dfde> /System/Library/PrivateFrameworks/CoreWiFi.framework/Versions/A/CoreWiFi
      0x10d444000 -        0x10d5dffff CoreWiFiOld.dylib (*) <d5ce0007-36ac-37a1-a5d7-07ad7365e60a> /System/Library/PrivateFrameworks/CoreWiFi.framework/Versions/A/CoreWiFiOld.dylib
      0x10d056000 -        0x10d057fff com.apple.IO80211 (1.0) <c0791260-3db4-30e8-962c-1d7a90bbe2d5> /System/Library/PrivateFrameworks/IO80211.framework/Versions/A/IO80211
      0x10d061000 -        0x10d061fff com.apple.WiFiPeerToPeer (652.55.0) <6de18c87-b584-3fba-b9f2-5439ee94f3f7> /System/Library/PrivateFrameworks/WiFiPeerToPeer.framework/Versions/A/WiFiPeerToPeer
      0x17689e000 -        0x1768f1fff IO80211Old.dylib (*) <d5ce0007-f5f4-3ab8-a256-05df5202823b> /System/Library/PrivateFrameworks/IO80211.framework/Versions/A/IO80211Old.dylib
      0x1e640b000 -        0x1e6432fff WiFiPeerToPeerOld.dylib (*) <d5ce0007-9684-3a09-bf78-fb3a4f8bb7b1> /System/Library/PrivateFrameworks/WiFiPeerToPeer.framework/Versions/A/WiFiPeerToPeerOld.dylib
      0x2da709000 -        0x2da9d5fff libnss3.dylib (*) <4c4c449b-5555-3144-a1ce-153a9242e9fd> /Applications/Thunderbird.app/Contents/MacOS/libnss3.dylib
      0x2dbc97000 -        0x2dc767fff libgkcodecs.dylib (*) <4c4c4478-5555-3144-a176-a5710479f9c6> /Applications/Thunderbird.app/Contents/MacOS/libgkcodecs.dylib
      0x10d400000 -        0x10d423fff liblgpllibs.dylib (*) <4c4c44b4-5555-3144-a1b9-b5c664969bb6> /Applications/Thunderbird.app/Contents/MacOS/liblgpllibs.dylib
      0x10d06b000 -        0x10d06bfff com.apple.framework.CoreWLAN (16.0) <cf40012c-37ff-356e-863f-24c150978974> /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLAN
      0x25d475000 -        0x25d4effff CoreWLANOld.dylib (*) <d5ce0007-0117-3ddb-beb8-5886a5f8b758> /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLANOld.dylib
      0x2f35dd000 -        0x2fe8e2fff XUL (*) <4c4c44ee-5555-3144-a15b-7a3b6ab61736> /Applications/Thunderbird.app/Contents/MacOS/XUL
      0x10d42f000 -        0x10d430fff org.mozilla.channelprefs (1.0) <4c4c4410-5555-3144-a148-95c735c87f29> /Applications/Thunderbird.app/Contents/Frameworks/ChannelPrefs.framework/ChannelPrefs
   0x7ff815680000 -     0x7ff8156bbfff libsystem_kernel.dylib (*) <10094a6c-fa57-367f-b06e-7c449ea31285> /usr/lib/system/libsystem_kernel.dylib
   0x7ff81532e000 -     0x7ff8153ba32f dyld (*) <69c73748-37ae-3a6f-83af-690645c3da75> /usr/lib/dyld
              0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???
   0x7ff8156bc000 -     0x7ff8156c7fff libsystem_pthread.dylib (*) <c0db9cf9-86ec-31d4-a557-2c07945fd8f2> /usr/lib/system/libsystem_pthread.dylib
   0x7ff81572b000 -     0x7ff815bcaff2 com.apple.CoreFoundation (6.9) <541c6f06-0abc-39f5-a7d2-3cad5db19c04> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
   0x7ff81e9af000 -     0x7ff81e9faff7 libFontRegistry.dylib (*) <31b7fceb-b146-3e8d-a297-87c67730f388> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontRegistry.dylib
   0x7ff817c31000 -     0x7ff817e51ff5 com.apple.CoreText (841.0.0.1) <c3eb23cc-fc68-312e-bc9d-8e28a4a44da3> /System/Library/Frameworks/CoreText.framework/Versions/A/CoreText

External Modification Summary:

 Calls made by other processes targeting this process:
   task_for_pid: 0
   thread_create: 0
   thread_set_state: 0
 Calls made by this process:
   task_for_pid: 0
   thread_create: 0
   thread_set_state: 0
 Calls made by all processes on this machine:
   task_for_pid: 0
   thread_create: 0
   thread_set_state: 0

VM Region Summary: ReadOnly portion of Libraries: Total=1.3G resident=0K(0%) swapped_out_or_unallocated=1.3G(100%) Writable regions: Total=7.6G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=7.6G(100%)

                               VIRTUAL   REGION 

REGION TYPE SIZE COUNT (non-coalesced)

===== ======= =

Activity Tracing 256K 1 Kernel Alloc Once 8K 1 MALLOC 550.1M 21 MALLOC guard page 24K 6 STACK GUARD 56.0M 6 Stack 12.0M 6 VM_ALLOCATE 132.0M 18 VM_ALLOCATE (reserved) 7.1G 10 reserved VM address space (unallocated) __CTF 824 1 __DATA 30.4M 877 __DATA_CONST 95.2M 881 __DATA_DIRTY 2560K 333 __FONT_DATA 2352 1 __INFO_FILTER 8 1 __LINKEDIT 186.2M 17 __OBJC_RO 76.1M 1 __OBJC_RW 2354K 2 __TEXT 1.1G 902 __TPRO_CONST 272K 2 dsce.got 124K 1 dyld private memory 512K 2 mapped file 53.2M 51 owned unmapped memory 20K 1 shared memory 1124K 9

===== ======= =

TOTAL 9.4G 3151 TOTAL, minus reserved VM space 2.3G 3151



Full Report


{"app_name":"thunderbird","timestamp":"2026-09-09 13:49:48.00 +0200","app_version":"155.0","sroute_id":12,"slice_uuid":"4c4c4439-5555-3144-a100-2f79b5ba51e1","build_version":"15526.8.28","platform":1,"bundleID":"org.mozilla.thunderbird","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"macOS 15.0.1 (24A348)","roots_installed":0,"name":"thunderbird","incident_id":"D8368554-B699-4AD8-A8A6-2C4175E89A69"} {

 "uptime" : 25000,
 "procRole" : "Background",
 "version" : 2,
 "userID" : 501,
 "deployVersion" : 210,
 "modelCode" : "MacBookPro15,2",
 "coalitionID" : 1356,
 "osVersion" : {
   "train" : "macOS 15.0.1",
   "build" : "24A348",
   "releaseType" : "User"
 },
 "captureTime" : "2026-09-09 13:49:46.3562 +0200",
 "codeSigningMonitor" : 0,
 "incident" : "D8368554-B699-4AD8-A8A6-2C4175E89A69",
 "pid" : 8297,
 "cpuType" : "X86-64",
 "roots_installed" : 0,
 "bug_type" : "309",
 "procLaunch" : "2026-09-09 13:49:45.0052 +0200",
 "procStartAbsTime" : 25995372141555,
 "procExitAbsTime" : 25996722299153,
 "procName" : "thunderbird",
 "procPath" : "\/Applications\/Thunderbird.app\/Contents\/MacOS\/thunderbird",
 "bundleInfo" : {"CFBundleShortVersionString":"155.0","CFBundleVersion":"15526.8.28","CFBundleIdentifier":"org.mozilla.thunderbird"},
 "storeInfo" : {"deviceIdentifierForVendor":"1F778C59-C2BF-597B-B4D7-068A27420DA1","thirdParty":true},
 "parentProc" : "launchd",
 "parentPid" : 1,
 "coalitionName" : "org.mozilla.thunderbird",
 "crashReporterKey" : "A83FED70-635C-4178-5B0E-2FB36A313750",
 "codeSigningID" : "org.mozilla.thunderbird",
 "codeSigningTeamID" : "",
 "codeSigningFlags" : 570490881,
 "codeSigningValidationCategory" : 1,
 "codeSigningTrustLevel" : 4294967295,
 "bootSessionUUID" : "3B94A2DF-4DD0-4B72-9BCF-22A7621B9373",
 "wakeTime" : 7284,
 "sleepWakeUUID" : "9CEF8430-EEF8-43BB-AC16-8A9FF7407F51",
 "sip" : "enabled",
 "sroute_id" : 12,
 "exception" : {"port":515,"signal":"SIGKILL","guardId":0,"codes":"0x0000000000000203, 0x0000000000000000","violations":["ILLEGAL_MOVE"],"message":" ILLEGAL_MOVE on mach port 515 (guarded with 0x0000000000000000)","subtype":"GUARD_TYPE_MACH_PORT","type":"EXC_GUARD","rawCodes":[515,0]},
 "termination" : {"namespace":"GUARD","flags":2,"code":2305843146652647939},
 "extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
 "faultingThread" : 0,
 "threads" : 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 "usedImages" : [
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   "source" : "P",
   "arch" : "x86_64",
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   "CFBundleShortVersionString" : "155.0",
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Model: MacBookPro15,2, BootROM 2022.100.22.0.0, 4 processors, Quad-Core Intel Core i7, 2,11 GHz, 32 GB, SMC Graphics: Intel HD Graphics 620, Intel HD Graphics 620, Built-In Display: Unknown Display, 2048 x 1152, Main, MirrorOff, Online Memory Module: BANK 0/ChannelA-DIMM0, 16 GB, DDR4, 2400 MHz, SK Hynix, HMA82GS6AFR8N-UH Memory Module: BANK 2/ChannelB-DIMM0, 16 GB, DDR4, 2400 MHz, SK Hynix, HMA82GS6AFR8N-UH AirPort: spairport_wireless_card_type_wifi (0x14E4, 0x117), Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1772.1) AirPort: Bluetooth: Version (null), 0 services, 0 devices, 0 incoming serial ports Network Service: Wi-Fi, AirPort, en1 PCI Card: Intel HD Graphics 620, VGA compatible controller, Internal@0,2,0 PCI Card: Sunrise Point-LP HD Audio, Audio device, Internal@0,31,3 USB Device: USB30Bus USB Device: USB3.0-CRW USB Device: vendor_device USB Device: Integrated Camera USB Device: BRCM20702 Hub USB Device: Bluetooth USB Host Controller Thunderbolt Bus:

Open 14

Thunderbird reinstall still locks up with "Not Responsing" status.

I added a new entry in my Address Book and sent a message to that person. I next tried to use Thunderbird to read messages and it locked up. No system shutdown/restart f… (gụkwuo)

I added a new entry in my Address Book and sent a message to that person. I next tried to use Thunderbird to read messages and it locked up. No system shutdown/restart fixed that. Reinstall ofThunderbird did not fix it either. I have many stored messages that I do not want to lose, so I have not erased all about Thunderbird. What do I try next?

Open 2

I cannot open Thunderbird on my personal computer, but on my Iphone it works

I cannot open the email program with Thunderbird, I have trie to open it by pressing Shift and Thunderbird Icaon, thus the Repair menu opens, I have tried every combinati… (gụkwuo)

I cannot open the email program with Thunderbird, I have trie to open it by pressing Shift and Thunderbird Icaon, thus the Repair menu opens, I have tried every combination in that , like starting in the secured modus, but it did not help, I have tried to delete the "parent-lock" data in %appadat%\Thunderbird\Profiles\ - it said that I cannot delete it,because it is opened in Thunderbird. Would you kindly help me? Thank you very much

Open 2 1

My Firefox crashed last thursday. Numerous crash reports sent.. Its XUL.DLL thats causing the problem.

On Thursday 3rd September 2026 Firefox stopped working. I tried lots of things to get it to work to no avail. Today, 8th September 2026, I had already deleted the Fire… (gụkwuo)

On Thursday 3rd September 2026 Firefox stopped working. I tried lots of things to get it to work to no avail. Today, 8th September 2026, I had already deleted the Firefox that was already on my PC so I downloaded a fresh copy from the Firefox website and installed it. It ran perfectly for about 30 minutes then I shut it down. 5 Minutes later, a Firefox crash report appeared which I duly sent of. Checking Event Manager a string of error messages saying the same thing, Its the XUL.DLL file that keep crashing! This was the same file that caused the failure last week. I had made sure that XUL.DLL was not on the pc when I downloaded Firefox today. When I click on the Firefox icon it open but stays on a black lower half of the screen and boxes at the top, white lined but black and transparent lines moving left to right across them, eventually it fails and closes, after a few minutes it send the crash report. Its a shame because I have used Firefox for many, many years and now having to use Edge!!!!

Open 1

no respond from Thunderbird (bug2071123)

When starting thunderbird, the program cannot find my e-mails and does not respond. It is frozen. deinstallation and new installation did not help. The version i do not k… (gụkwuo)

When starting thunderbird, the program cannot find my e-mails and does not respond. It is frozen. deinstallation and new installation did not help. The version i do not know because I cannot open the menue.

Open 5 1