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This is maddening. A couple of days ago TB started to freeze. I have not added any new add-ons. I don't even have any add-ons. I tried one suggestion of repairing and compacting folders and that did not help. I also tried the accessibility.force_disabled change from 0 to 1. It is still happening. I have to use Task Manager to shut it down because if I right-click and close it tells me that TB is already running but not responding when I try to restart it. It takes 4-5 tries to get it to the point where I can have a few minutes to do anything in the program. If I leave and come back, the mail window is frozen. Help, please! I have been using TB for years and never had this problem!

Hello!

I am getting consistent issues with Firefox where the tabs seemingly just crash with no rhyme or reason to them. Could be within a few seconds, could be after a few minutes. Doesn't seem to be one website causing it either as I was worried it was Twitch but I get issues browsing other places too. Any help would be appreciated!

Here are the last 5 crash reports:

https://crash-stats.mozilla.org/report/index/ec73ed64-a446-42d2-9d3c-7e4eb0251111 https://crash-stats.mozilla.org/report/index/3cee5bdf-a6c5-423b-be72-495120251111 https://crash-stats.mozilla.org/report/index/b56f84df-ad2a-4bca-9ed4-c168c0251111 https://crash-stats.mozilla.org/report/index/accb021f-0cf7-4b20-a2cc-99e8d0251111 https://crash-stats.mozilla.org/report/index/91189681-3123-4d91-ab6a-c5f2c0251111

Hi -- I'm getting quite a few page crashes that seem mostly tied to YouTube, although not exclusively. I only recently swapped over to Firefox from Chrome because I was having similar crashing issues with that browser as well. This is after a fresh install of Windows 11 Pro and a number of different benchmark tests (no known issues with CPU, GPU, or RAM).

Since there are so many reports that all seem different, could someone help troubleshoot? I really can't tell if it's a browser problem, maybe something with my MOBO or PSU or other hardware.

bp-8849827b-dbff-4f56-ab32-a00e50251111 11/10/2025, 7:04 PM bp-b9b83d66-9ac5-4eae-9676-367000251111 11/10/2025, 7:04 PM bp-4b8e92c0-0a15-45ef-b8e1-567920251111 11/10/2025, 7:02 PM bp-4c1a61f1-674e-4da0-8921-156f50251110 11/10/2025, 12:21 PM bp-659dc04a-4933-4a3b-919b-3c1c50251110 11/10/2025, 12:21 PM bp-9387464a-bc4e-4217-995a-f457f0251110 11/10/2025, 12:21 PM bp-97bc77f5-3fa3-4623-b48b-d94e90251110 11/10/2025, 12:21 PM bp-47d723e7-4eab-41d1-b97b-410ef0251110 11/10/2025, 12:21 PM bp-58abdc4e-d959-41c9-bf0a-469280251110 11/10/2025, 12:21 PM bp-b593054f-5a6c-4693-82c8-79d410251109 11/9/2025, 6:47 PM bp-13f555f8-c219-4995-b09f-b15440251109 11/9/2025, 2:11 PM bp-91cbf8ab-d793-4781-ba28-0fd030251109 11/9/2025, 2:11 PM bp-5e7db47b-6114-4cc6-a1ac-daaca0251109 11/9/2025, 2:11 PM bp-ef240795-bedf-4c26-91f2-386ba0251109 11/9/2025, 2:11 PM bp-51ec26ab-03f0-4e0b-b199-b2f600251109 11/9/2025, 2:11 PM bp-aef18aaf-1b2e-410e-9170-99fd50251109 11/9/2025, 2:11 PM bp-e5bc73e3-293e-4b3a-8974-e088c0251107 11/7/2025, 1:38 PM bp-85a1ba73-0df8-484b-b9bb-945cc0251107 11/7/2025, 10:59 AM bp-26c84615-670b-49e8-88aa-c26ac0251107 11/7/2025, 10:59

I was trying to change the time emails are kept on the server so I went into "Account Settings" and now Thunderbird is locked onto this page. I get a "Mozilla Thunderbird not responding" message when I try and click on anything and I can't get out of this page nor access my Inbox. I've tried starting Thunderbird in Safe Mode which didn't work. I then uninstalled and reinstalled the latest version of Thunderbird but when it starts it goes straight back to the frozen "Account Settings" page. I've checked my profile and there is a new profile that was created with today's date. There is also a profile from June 2025. If the old profile contains all my emails and folders up to yesterday, that would be OK.

Confused. Version 144.0.1 | Released October 16, 2025 Says 32 bit. I thought I downloaded 64 bit.

Problem: Freezes when I click anywhere on TBird desktop

How do I address the freezing problem?

Thanks Robert

Hi,

Every time I try to connect to my Gmail account, the browser freezes and I have to restart it. I’ve tried everything, but nothing works. Please look into this — since your last update, Firefox has become unusable.

Thank you for your attention.

Hi

Thunderbird is crashing with error message: expected value at line 1 column 1

Error message in crash dialog box: " Thunderbird Crash Reporter Thunderbird had a problem and crashed. Unfortunately, the crash reporter is unable to submit a report for this crash. Details expected value at line 1 column 1 Restart Thunderbird | Quit Thunderbird "

troubleshooting so far:

• How often? periodically (sometime within minutes of loading, sometime hours).
• uninstalled, rebooted, reinstalled Thunderbird (using winget)
• created a NEW profile (have to re-download mail / folders ... taking day(s?) ... since when I walk away and come back hoping download has finished but it has crashed) ... not sure when it will get caught up ( main mail file is huge (20+GB) )
• tried: accessibility.force_disabled changed from 0 to 1 (found suggestion in a google search)
• tried: troubleshoot mode (even though I don't use any add-ons)
• I use multiple mail accounts (although currently I'm only using main one, trying to isolate problems)

Thanks for help.

Hi everyone,

I’ve run into a weird issue with Thunderbird on macOS 26 (Tahoe) and I’m wondering if anyone else has seen this.

When I close the main Thunderbird window using Command + W or RedDot Close Button, the window disappears like normal, but something is still left behind. It’s like an invisible or “ghost” window stays on the screen. Because of that, I can’t click anything that was underneath the Thunderbird window. The area is still blocked as if the window never fully closed.

If I open Mission Control (F3), I can see an empty tile where the window should be, which confirms that something is still there even though it’s not visible.

A few details: • The problem happens every time I close the main window with Command + W • Thunderbird keeps running in the background, but I can’t bring the window back unless I quit the app completely • This only happens with Thunderbird, no other app on macOS 26 has this issue on my machines • On previous macOS versions I never had this problem

System info: • macOS 26 (Tahoe), fully updated • Latest stable Thunderbird release • Mac mini M4 and MacBook Air M4

It looks like some kind of window management bug on macOS 26, but only triggered by Thunderbird.

Has anyone else experienced this or knows if it’s a known issue? Thanks!

I recently transferred my email account to The Messaging Company (big mistake I think) because my provider (Exetel) suggested them when they stopped hosting an email service. I then started having trouble receiving emails that I knew were sent and I thought that maybe my old emails were kept on the server too long and were taking up too much space on the server so I went into Thunderbird to change the settings to delete emails that had been on the server for 2 weeks. Thunderbird is now locked onto the Account Settings page and I can't get out of it. As soon as I click on the page I get the "Thunderbird not responding" message so I close the program. I've tried starting Thunderbird in safe mode with no result. I downloaded the latest version and reinstalled Thunderbird but as soon as I start the program it takes me straight into the "frozen" Account Settings page that I can't get out of. I have gone into The Profiles folder and I've included a screenshot of what's there. The latest profile was created when I tried to change the Account Settings. Can I delete that profile and go back to the one created on 9/6/2025?

Upgraded from Windows 10 to 11 a couple months ago. Since then, TB freezes nearly every time I am composing an email. "Help About" says TB is up to date. Remedies? Or do I have to wait for a new version?

Chris Sackett

Hi

I am using the latest TB build, 144.0.1and have only the British dictionary as an extension, no themes.

Occasionally TB will hang when launched and the Windows event viewer will show this....(added image)_

The friendly xml log within the event viewer...

AppName thunderbird.exe

 AppVersion 144.0.1.0 
 ProcessId 0x6234 
 StartTime 0x1dc51956edcf231 
 TerminationTime 5 
 ExeFileName C:\Program Files\Mozilla Thunderbird\thunderbird.exe 
 ReportId f3ad169f-c629-4357-85ae-7db29d0541f1 
 PackageFullName  
 PackageRelativeAppId  

HangType Cross-process

as noted, this only happens when the email client is launched and will not happen each time. I have tried without the dictionary, as it is so random it can take a while to occur, but that does not seem to make a difference.

I am using Windows 11 25h2

Thanks

Right after typing my email address and pressing "Continue", Thunderbird crashes. I wanted to give it a try after many years of not using it, but then it crashes right at the start.

Here's the crash report:

AdapterVendorID: 0x106b AvailablePhysicalMemory: 6554927104 AvailableSwapMemory: 1233125376 BackgroundTaskMode: 0 BuildID: 20251016001905 ContentSandboxCapable: 1 ContentSandboxLevel: 3 CrashTime: 1760704144 DOMFissionEnabled: 1 DOMIPCEnabled: 1 EMCheckCompatibility: true EventLoopNestingLevel: 1 GpuSandboxLevel: 0 GraphicsNumActiveRenderers: 0 GraphicsNumRenderers: 1 HeadlessMode: 0 InstallTime: 1760652930 LastStartupWasCrash: 0 MacAvailableMemorySysctl: 91 MacMemoryPressure: Normal MacMemoryPressureCriticalTime: Unset MacMemoryPressureNormalTime: 1760704136 MacMemoryPressureSysctl: 1 MacMemoryPressureWarningTime: Unset Notes: FP(D10-L1000-W0000000-T01) WR? WR+ GL Context? GL Context+ ProductID: {3550f703-e582-4d05-9a08-453d09bdfdc6} ProductName: Thunderbird PurgeablePhysicalMemory: 465715200 RDDProcessStatus: Running ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 825 StartupCacheValid: 1 StartupCrash: 0 StartupTime: 1760704136 SubmittedFrom: Client TelemetryEnvironment: {"build":{"applicationId":"{3550f703-e582-4d05-9a08-453d09bdfdc6}","applicationName":"Thunderbird","architecture":"aarch64","buildId":"20251016001905","version":"144.0.1","vendor":"Mozilla","displayVersion":"144.0.1","platformVersion":"144.0","xpcomAbi":"aarch64-gcc3","updaterAvailable":true},"partner":{"distributionId":null,"distributionVersion":null,"partnerId":null,"distributor":null,"distributorChannel":null,"partnerNames":[]},"system":{"memoryMB":65536,"virtualMaxMB":null,"cpu":{"extensions":["hasNEON"]},"os":{"name":"Darwin","version":"23.5.0","locale":"en-IL"},"hdd":{"profile":{"model":null,"revision":null,"type":null},"binary":{"model":null,"revision":null,"type":null},"system":{"model":null,"revision":null,"type":null}},"gfx":{"D2DEnabled":null,"DWriteEnabled":null,"ContentBackend":"Skia","Headless":false,"TargetFrameRate":60,"textScaleFactor":1,"adapters":[{"description":null,"vendorID":"0x106b","deviceID":null,"subsysID":null,"RAM":0,"driver":null,"driverVendor":null,"driverVersion":null,"driverDate":null,"GPUActive":true}],"monitors":[{"screenWidth":2560,"screenHeight":1440,"defaultCSSScaleFactor":1,"contentsScaleFactor":1},{"screenWidth":3024,"screenHeight":1964,"defaultCSSScaleFactor":2,"contentsScaleFactor":2}],"features":{"compositor":"webrender","hwCompositing":{"status":"available"},"gpuProcess":{"status":"unused"},"webrender":{"status":"available"},"wrCompositor":{"status":"available"},"openglCompositing":{"status":"available"},"omtp":{"status":"unused"}}},"appleModelId":"Mac14,5","hasWinPackageId":null},"settings":{"blocklistEnabled":true,"e10sEnabled":true,"e10sMultiProcesses":8,"fissionEnabled":true,"locale":"en-US","intl":{"requestedLocales":["en-US"],"availableLocales":["en-US"],"appLocales":["en-US"],"systemLocales":["en-IL","he-IL"],"regionalPrefsLocales":["en-IL","he-IL"],"acceptLanguages":["en-US","en"]},"update":{"channel":"release","enabled":true,"autoDownload":true,"background":true},"userPrefs":{"browser.search.region":"DE","network.http.microsoft-entra-sso.enabled":false,"network.trr.strict_native_fallback":false,"widget.content.gtk-high-contrast.enabled":true},"sandbox":{"effectiveContentProcessLevel":3,"contentWin32kLockdownState":3},"addonCompatibilityCheckEnabled":true,"isDefaultBrowser":null,"defaultSearchEngine":"ddg","defaultSearchEngineData":{"loadPath":"[app]ddg","name":"DuckDuckGo","submissionURL":"https://duckduckgo.com/?q="}},"profile":{"creationDate":20377,"firstUseDate":20377},"addons":{"activeAddons":{},"theme":{"id":"default-theme@mozilla.org","blocklisted":false,"description":"Follow the operating system setting for buttons, menus, and windows.","name":"System theme — auto","userDisabled":false,"appDisabled":false,"version":"1.4.2","scope":4,"foreignInstall":false,"hasBinaryComponents":false,"installDay":20377,"updateDay":20377},"activeGMPlugins":{"dummy-gmp":{"version":"0.1","userDisabled":false,"applyBackgroundUpdates":1}}}} Throttleable: 1 TotalPhysicalMemory: 68719476736 UptimeTS: 7.916666666666666 Vendor: Mozilla Version: 144.0.1 useragent_locale: en-US This report also contains technical information about the state of the application when it crashed.

I've used Slack every day for the past decade, and Firefox has been my primary browser for some time now. I've never had an issue with the two, but now, Firefox is reliably crashing every time I attempt to open Slack.

I've tried clearing my cache both broadly and specific to Slack, with neither producing results. Even tried deleting all cookies on Firefox, which was a bit of a pain, and it was no help.

I did read up on some people encountering a similar issue that could be fixed by deleting the Slack entry in "about:serviceworkers," but this did not help here.

The only extension I'm running is uBlock Origin, which I've been running for probably as long as I've been using Firefox, and that has never presented an issue before either.

Would appreciate any help or advice on the matter.

Thunderbird doesn't open. I suspect because it opens every message I get or send either in a tab or a list or both. Then there gets to be too many of these. I didn't ask for any of these things! Why can't I just get messages like I used to, and not have to constantly be concerned with closing tabs and closing lists? It is ridiculous, and now the program won't even open. I know I am asked to be polite, and it is the programmers who are at fault, not the community volunteers. But we are not allowed to contact and complain to the programmers!

I am using Thunderbird v140.4esr (32-bit), and the app hangs shortly after I try to create a new email, and I have to close the program and start again. I am using Windows 10 v22H2, current October patch. Whenever I try to create a new email in Thunderbird, I can type about a paragraph or two, then the window with the new email freezes, and the only way I can proceed is to force the program to close and start again. Sometimes I can recover part of the new email by choosing Drafts, but shortly after, it will hang again, and the process starts all over again. This has only started recently. It was functioning properly about a month ago. Why is this happening, and what can I do to mitigate it?

My Firefox keeps crashing several times daily.

Here are reports of the latest:

bp-11b5db38-0184-4ac0-a332-b10390251107 bp-73e35a70-a845-43db-a298-690d90251107 bp-c96ea9c5-c651-46e8-bc42-ad7830251107