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i keep getting Firefox crashes and i also get Firefox already running close firefox i have the latest version i do not understand why please help thanks

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

I'm running Sequoia 15.1.1 on an M1 Mac Mini. Never had problems before. TB 128.6 0 esr.

As soon as it opens it crashes.

I have a lot of unopened files in a pop mailbox, going to try and remove them.

It seems to still work on my iPhone. Any ideas?

I M get this working. I'm in a panic. Please help.

bp-f7b43b48-1330-4328-a36a-2d3f10260127

Firefox has been crashing regularly for a full day now. I have one profile with multiple extensions, and a fresh profile that is meant to test firefox without any. With this new, "clean-slate" profile with none of my extensions installed, I still get repeated crashes. It is getting in the way of my ability to work- it happens even in Troubleshoot mode, even though I could not confirm any hardware issues prior to this.

Will I need to delete the extenstion-filled profile entirely before going forward? Is there an update I need to install, or anything else I should do myself? Should I provide a list of my extensions?

Attached is the Report ID of my latest crash- hopefully it will help.

Thank you!

Aloha, I have been using Thunderbird since decades. Since a few weeks (or even months) by now, it is hanging all the time. Meanwhile it is totally impossible to use it properly. Whenever I klick on something it hangs itself up and I have to wait at least a minute until I can click something else and then it hangs again.

I already tried reinstalling, but that didnt change anything. Of course I also rebooted the computer.

Why is that so and what can be done?

Mahalo, Stefanie

Hello,

I have today encountered a reproducible issue with Firefox 145.0.2 (64-bit) on my system (CachyOS Linux). Whenever I press the "Print" button in the printing dialog for a PDF file, the browser freezes and no longer reacts to anything. I had to kill the process manually and try again. I have then downloaded the PDF and opened a different application to print it - that worked fine. Is this a known issue with Firefox? Does anyone have an idea how to fix this?

I already tried resetting the printer settings in the browser, but that did not change anything.

Thanks, Stefan

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.

Since i updated to 144 Thunderbird works well once started for a few minutes and then starts eating memory and in a few minutes it uses all system memory (64GB) and when virtual memory is exhausted it crashes

Now using 145 beta with same problem.

Using google calendar and only one plugin (Clippings for Thunderbird), tried to disable plugins, calendar, hardware acceleration, tried to compact folders, clear cache, clear msf with no success

Just upgraded to a new system with Windows 11. Avast Security. Installed Thunderbird 128.5.2esr same as on old system. Migrated old emails using MozBackup. Worked great for a day. New emails, archived a bunch of emails to a local folder...

Next day after about 3-5 minutes Thunderbird shows the Hourglass and is not responding. Eventually will go to a greyed out window. I have to kill it with task manager. I noticed that in Activity Manager three calendars were syncing for a long time. Disabled all calendars.

Task manager shows CPU usage but 0 Network and 0 Disk activity. 3 sub processes but only one has CPU. Resource Manager shows CPU and 72 threads. Resource Manager - Analyze Wait Chain - reports "waiting to finish network I/O."

I've tried Troubleshooting Mode. Still froze during Troubleshooting Mode. I've tried moving a large local folder out of the mail folder entirely. I've tried clearing the startup cache. I've tried clearing the system temp folder.

I have a lot of accounts, saved emails and message filters. So I really don't want to start over again with an empty Thunderbird and reset up accounts.

the crash reports have been submitted 748057a7-6757-6eb2-955e-9602f9e91008

is there anything else I can do to get this looked into/resolved?

Laptop System: Acer product: Nitro AN515-57 Linux Mint 22.2 Zara \n \l

"Nothing happens here" after the Microsoft OS install Thunderbird stopped working. I had no menu bar but it did download messages. I reinstalled Thunderbird and it installed Outlook then Thunderbird. I have a menu bar but none of the tasks is accessible. It downloads messages but I cannot open, delete or move them. I need to go to task manger to close the app. When I go there, there are multiple tasks for Thunderbird. Tried a shift start but I could not even see the inbox after deselecting addons. Just the menu bar and the rest is a blank page.

Tried a screen shot but this does not work.

I have Win 11 dell computer that does not play or pick up sound from web sites videos .I checked and tested my sound using the Microsoft platform & buy playing a disc. It works OK

Firefox crashed and I restarted it and hit "Restore previous session". It started to do that, but then crashed again with a pop-up saying:

firefox.exe - Application Error A breakpoint has been reached. (0x80000003) occurred in the application at location 0x00007FFE1613B40E.

Click on OK to terminate the program

I clicked on OK. When I tried to restart, all my windows and tabs were not available and the "Restore previous session" button was gray.

Can someone fix this bug?

After months of constant Thunderbird crashes and hundreds of crash reports, and as many attempts at trying to resolve the issue but without any resolution, I am now getting the following message when Thunderbird crashes:

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

I have version 128.5.2esr installed, but the issues started well before this version you can see the information in the crash reports if you want to look at them. I have tried Troubleshooting Mode, and can confirm the issue persists. I have also noticed that the one IMAP account I have attempts to redownload all messages from the mail server - it never completes because Thunderbird always crashes first. Aside from the obvious request for troubleshooting suggestions on the primary crash issue, I have three additional questions:

1. Is there a way for me to isolate that IMAP account, in another profile or such, to see if that account or server is contributing to the issue?

2. How is the crash report interpreted - i.e. where do I look to see the actual cause of the crash? In the "Details" tab the CRASH REASON and CRASH ADDRESS are not very informative to the average user.

3. What is the best way to provide a list of crash reports - I've had nearly 30 over the past few days, and - literally - hundreds since the issue began in October (which did not appear to coincide with anything in particular - e.g. new hardware or software, or TB update. Is is acceptable to post a list in the body of this thread, or as a txt document, or .... ?

BTW, running this on a Windows 10 22H2 machine, i9-14900KS, 32Gb DDR5, previously nVidia Quadro P5000 now Intel Arc A770 Graphics. Yes, have tried rebuilding POP3 folders, and yes I have a backup of my profile, which is about 35Gb in size.

TIA

I can't close TB. It is frozen in the midst of trying to compact files. This is the error message:

"Compact folders (Not responding) Thunderbird needs to do regular file maintenance to improve the performance of your mail folders. This will recover 685 MB of disk space without changing your messages. To let Thunderbird do this automatically in the future without asking, check the box below before choosing ‘Compact now’."

My husband and I had the same problem with our laptops not loading emails, saying it doesn't have sufficient file space. I fixed his by deleting a lot of files and then compacting the remainder. BUT - this isn't working for mine. In the process of trying to compact files, it froze and I can't figure out a way to close it and try again.

Any help appreciated! Thanks.

Started using Netscape and been with Firefox ever since it started. For the last few months, I find that my Draytek 2866Lac router randomly crashes and resets itself when I am using Firefox. I cannot pin it down to opening any particular website but it seems to be related to opening a new tab / link. I have FF set to open new tab automatically and no extensions (other than British English) are in use. Using FF, I can seldom go more than 5 -6 hours between resets. Not using FF, I have now managed 2 days constant uptime on the router - which is a fantastic change! Is there something peculiar with my system and any ideas how I can get stability again please?

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.

MAC OS Tahoe 26.0 Public Beta 6 Since upgrading to this latest beta, with Open NewMassage in a new message window, does not open the window. It seems to create it in the back ground, and Thunderbird icon on the task bar shows the additional windows, but they are un selectable. Choosing open message in newt does work.

This seems to be occurring after beta 6 , it was working under beta 5

for some weeks now, Firefox (latest, in Windows) crashes, or says 'not closed properly' and shows (usually) 12 'instances' in Task Manager when only one tab has been opened. I'm not techie, and need clear advice. Can anyone help please? Hugh, UK