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First, there used to be a columnar format that included a heading. I could sort entries by double clicking the column heading. This was handy for selecting email by date and deleting or moving them. That seems to have disappeared in Versiona 128.9 Oesr. Is there a way to recover that view?

The reason I discovered this is that I'm receiving a message on virtually every attempted Thunderbird operation saying that there is not enough disk space to complete the operation. I cannot tell if this is a Thunderbird message or a Microsoft (Windows 11) message. I've attached a screenshot. I've checked and there should be plenty of disk space; but, of course, there is a lot of spam mail in my T-Bird that I could easily delete. I've tried setting up Message Filters to delete unwanted email but that, too, produces the error message.

Can anyone tell me how to a) get my column headings back in T-bird, and b) fix whatever is causing the message?

Transferring bookmarks & backups for passwords is easy and I'm not worried about that. But the about:config settings that I have customized and accreted over years so that nothing beeps, spins, auto-plays, loops, or throbs a tab, are not so straightforward. I'd like to review what files I can save how to make sure I do not lose these, which are the most important things to me about my Firefox installs--keeping the web safe for quiet, nondistracting searches and reading.

Windows 10 Enterprise, managed by my organization, but with just enough admin privileges to customize my Firefox.

In trying to access (log in)Social Security Administration, I received "Bad Request""your browser sent a request that this server could not understand. Size of a request header exceeds server limit" I was able to log in with Chrome. Can this be corrected by mozzilla?

I have used Firefox for years and I enjoy the variety of articles that are available to read when I first sign on.

But more and more sites request me to "Please Disable your Add Blocker" and will not let me read the article without doing so

That's fine with me but when I look at my "Extensions" list I do not find any Add Blocker on my Firefox

So...How can I disable it ??

after migrating to new windows 11 pc's how do I set Thunderbird so it will show that you have opened an email off the server at your terminal but others viewing same email account will see it as unopened until they open the email at their terminal, I have settings to not "automatically show as read" on all 3 terminals but now all incoming emails stay black highlighted as "unread" for all users sharing this account even after all 3 user terminals have actually opened said email using POP server

cant recover bookmarks says that security software causes this cant find a answer nothing works please help trying to fix this i have mcaffee security in machine a

I think it started to happen with Version 128.9.0esr | Released April 1, 2025. It is very simple to reproduce: 1. Start TB. 2. TB downloads new messages and continues to do it every 1 minute according to the setting. 3. In 10 to 20 minutes, it hangs. I have to force it to close and then restart it to check my email.

I believe it started to happen yesterday.

Is anyone else experiencing this?

Websites, even https website, will not load after update to latest version. Cannot even load https://www.duckduck.com. Your support website will not load. Have to use a difference browser than Firefox. Yikes!

I have a user that gets this crash report when trying to use certain sites like ebay and fidelity investments. Brand new PC, updated drivers, all fresh software installed. Very basic.

AdapterDeviceID: 0x25b2 AdapterDriverVersion: 32.0.15.7283 AdapterSubsysID: 18791028 AdapterVendorID: 0x10de Add-ons: formautofill%40mozilla.org:1.0.1,pictureinpicture%40mozilla.org:1.0.0,webcompat%40mozilla.org:137.7.0,default-theme%40mozilla.org:1.4.1,addons-search-detection%40mozilla.com:2.0.0 AvailablePageFile: 29719490560 AvailablePhysicalMemory: 25527115776 AvailableVirtualMemory: 138522406883328 BackgroundTaskMode: 0 BuildID: 20250327043313 CPUMicrocodeVersion: 0x12c ContentSandboxCapable: 1 ContentSandboxLevel: 8 ContentSandboxWin32kState: Win32k Lockdown enabled -- default value is true CrashTime: 1743705704 DOMFissionEnabled: 1 DOMIPCEnabled: 1 EMCheckCompatibility: true EventLoopNestingLevel: 1 GPUProcessLaunchCount: 1 GPUProcessStatus: Running GpuSandboxLevel: 1 HeadlessMode: 0 InstallTime: 1743700048 LastStartupWasCrash: 0 LauncherProcessState: 0 ModuleSignatureInfo: {"Microsoft Windows Hardware Compatibility Publisher":["umppc19409.dll","CsXumd64_19409.dll"],"Mozilla 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Systems, Inc.":["CtxWebAuthnHook.dll","Citrix.Hdx.WebAuthnProtocol.dll","CtxMFPlugin64.dll","PicaDdApi64.dll","CtxWsApi64.dll","PicaWsApi64.dll","CxInjIme.dll","Citrix.Hdx.Seamless.Hooking.dll","ShellHook.dll","PicaWtsHook.dll","SCardHook.dll","FullScreenHook.dll","MfApHook.dll"],"Microsoft Windows Software Compatibility Publisher":["msvcp140.dll","VCRUNTIME140_1.dll","VCRUNTIME140.dll"]} NimbusEnrollments: backgroundupdate-enable-unelevated-installations-rollout-3-release:enabled,product-insight-telemetry-via-server-knobs-rollout-release:control-rollout,upgrade-spotlight-rollout:treatment,address-autofill-desktop-pref-release-rollout:enable-address-autofill,encrypted-client-hello-fallback-mechanism:control,fx-accounts-ping-release-rollout-2:control,disable-ads-startup-cache:control,us-review-checker-rollout-v3:treatment-a,us-rollout-compact-layout-thumbs-updown:rollout,unified-api-for-spocs-and-top-sites-controlled-rollout-for-release-133:control,long-term-holdback-2025h1-growth-desktop:delivery,fx-view-discoverability-2025-rollout:treatment-b,default-ui-experiment-logo-in-corner-rollout:logo-in-corner,certificate-transparency-desktop-rollout:certificate-transparency-enforced,fox-doodle-multi-action-cta-2025-rollout:treatment-a,ai-chatbot-rollout-in-the-old-sidebar:treatment-d,pdf-annotations-highlight-treatment-b-rollout:treatment-b,crlite-rollout:rollout,mozilla-vpn-in-private-browsing-treatment-d-rollout-en-only:treatment-d,https-upgrades-fallback-time-bugfix:rollout,onboarding-set-up-checklist-windows-rollout-march:treatment-branch,new-onboarding-experience-experiment-phase-1-windows:control,pdf-annotations-signatures-ab-experiment:control,persist-search-term-rollout-phase-1:control-rollout Notes: Has dual GPUs. GPU #2: AdapterVendorID2: 0x8086, AdapterDeviceID2: 0xa780, AdapterSubsysID2: 18791028, AdapterDriverVersion2: 32.0.101.6078FP(D10-L1000-W0000100-T01) DWrite? DWrite+ WR? WR+ ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox QuotaManagerStorageIsNetworkResource: 0 RDDProcessStatus: Running ReleaseChannel: release SafeMode: 0 StartupCacheValid: 1 StartupCrash: 0 StartupTime: 1743705686 SubmittedFrom: Client SystemMemoryUsePercentage: 24 TelemetryClientId: d5931f57-29c2-4c0d-83be-01c3597f48a5 TelemetryEnvironment: 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TelemetryProfileGroupId: 2d402427-2e67-4e24-8111-97e4d026d28a TelemetryServerURL: https://incoming.telemetry.mozilla.org TelemetrySessionId: f0024485-7300-4991-96cf-f0e9f8e7b69f Throttleable: 1 TotalPageFile: 39399960576 TotalPhysicalMemory: 34031251456 TotalVirtualMemory: 140737488224256 URL: https://digital.fidelity.com/prgw/digital/login/full-page UptimeTS: 176.53215 UtilityProcessStatus: Running Vendor: Mozilla Version: 137.0 Winsock_LSP: Hyper-V RAW : 2 : 34 : 1 : 1 : 0x20026 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 1234191b-4bf7-4ca7-86e0-dfd7c32b5445

AF_UNIX : 2 : 1 : 1 : 0 : 0x20026 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : a00943d9-9c2e-4633-9b59-0057a3160994 
MSAFD Tcpip [TCP/IPv6] : 2 : 23 : 1 : 6 : 0x20066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : f9eab0c0-26d4-11d0-bbbf-00aa006c34e4 
MSAFD Tcpip [UDP/IPv6] : 2 : 23 : 2 : 17 : 0x20609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : f9eab0c0-26d4-11d0-bbbf-00aa006c34e4 
MSAFD Tcpip [RAW/IPv6] : 2 : 23 : 3 : 0 : 0x20609 : 0xc : %SystemRoot%\system32\mswsock.dll :  : f9eab0c0-26d4-11d0-bbbf-00aa006c34e4 
MSAFD Tcpip [TCP/IP] : 2 : 2 : 1 : 6 : 0x20066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : e70f1aa0-ab8b-11cf-8ca3-00805f48a192 
MSAFD Tcpip [UDP/IP] : 2 : 2 : 2 : 17 : 0x20609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : e70f1aa0-ab8b-11cf-8ca3-00805f48a192 
MSAFD Tcpip [RAW/IP] : 2 : 2 : 3 : 0 : 0x20609 : 0xc : %SystemRoot%\system32\mswsock.dll :  : e70f1aa0-ab8b-11cf-8ca3-00805f48a192 
RSVP TCPv6 Service Provider : 2 : 23 : 1 : 6 : 0x22066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
RSVP TCP Service Provider : 2 : 2 : 1 : 6 : 0x22066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
RSVP UDPv6 Service Provider : 2 : 23 : 2 : 17 : 0x22609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
RSVP UDP Service Provider : 2 : 2 : 2 : 17 : 0x22609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
MSAFD L2CAP [Bluetooth] : 2 : 32 : 1 : 256 : 0x20006 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9fc48064-7298-43e4-b7bd-181f2089792a 
MSAFD RfComm [Bluetooth] : 2 : 32 : 1 : 3 : 0x20026 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9fc48064-7298-43e4-b7bd-181f2089792a

useragent_locale: en-US This report also contains technical information about the state of the application when it crashed.

Whenever I select a message, Thunderbird automatically opens the message in a new tab. It hasn't always done this, and I don't want it to. It just started doing it one day and won't stop.

This is particularly painful when I select 10 messages to delete and instead I get 10 open windows! Please help me stop the madness.