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Hi!

We have a intranet site that works in Edge and Chrome without issues with the site added to "internet options". But for some reason we are getting 401 Unauthorized when trying to access it from Firefox. I have tried adding the urls to: network.automatic-ntlm-auth.trusted-uris network.automatic-ntlm-auth.allow-proxies: true network.automatic-ntlm-auth.allow-non-fqdn: true network.auth.force-generic-ntlm: false network.auth.force-generic-ntlm-v1: false

Ingocnito mode , same error. I have tried disabling all plugins. Disabled DNS over HTTPS.

HTTP/1.1 401 Unauthorized Server: Microsoft-IIS/10.0 WWW-Authenticate: Negotiate X-Powered-By: ASP.NET Date: Mon, 25 May 2026 08:15:41 GMT Content-Length: 0

Regards Rasmus

I have several open email tabs but they are showing nothing and when I find the email in my in box it opens blank I've also had problems with thunderbird opening have had to restart computer several times?

When I open Thunderbird it is sending my emails directly to the deleted folder. I have tried all-sorts and cannot find an answer. I transferred Thunderbird to my new PC and all was working okay for a few weeks then all of a sudden there were emails missing from my inboxes and I found them in the deleted folder. I am 76 years old and need an easy step by step solution please ..... John

I have two Yahoo accounts in Thunderbird. One uses normal password and works great. For the second one, Thunderbird forced me into OAuth2 and it constantly returns all kinds of connectivity errors. I've tried to re-add the account with normal password, but Thunderbird returns that the password is not correct. What is pCENT? Is there a way to force Thunderbird into using normal password?

Aloha. I'm helping a friend with setting up a new Windows 11 PC, and cannot get Thunderbird to connect to Spectrum's servers. I spent an hour on the phone with Spectrum support and they just gave up and said it must be an issue with Thunderbird. Here are the details:

- Brand new Dell 24 All-in-One EC24250 - Windows 11 25H2 plus all additional fixes. - All Dell drivers updated. - Thunderbird V155.0 64-bit

If I click on 'Get Messages' after a while I get: "Connection to server mail.twc.com timed out". I've gone into the config editor and changed mailnews.tcptimeout from 100 to 500 and still get the error.

In the Account Settings | Server Settings | Test server connection I get: An error occurred connecting to mail.twc.com:993.

I've tried this with both setting up a brand new account in Thunderbird, and also via copying the 'Thunderbird' folder from %appdata%\roaming from her old machine.

Email configuration (from Spectrum).

IMAP Settings Server name: mail.twc.com Port: 993 user name: abcd@hawaii.rr.com Connection Security: SSL/TLS Authentication method: Normal password

SMTP settings Server Name: mail.twc.com Port 587 Connection Security: STARTTLS Authentication method: Normal password

Can anyone help me troubleshoot this scenario?

Mahalo, Harry Z

Kubuntu 24.04 Firefox 154.01

{Quote from Mozilla Support:} "Impact on data after a password reset: If you reset your account password with a recovery key, you keep access to encrypted sync data (like bookmarks, passwords and settings) on Mozilla’s servers."

"Without the recovery key, this synced data is erased for security. However, if you reset your password on a device that has a local copy of your data, signing in with your new password will re-upload the local data to Sync. On a device without local data, the synced data will be permanently lost." {Unquote}

   I am already "signed-in" (by Password Mgr.) so can't get
   the Mozilla Account Sign-in Dialog, so don't see a link to
   "Forgot Password"

{Quote from Mozilla Support:} "Impact on data after a password reset: If you reset your account password with a recovery key, you keep access to encrypted sync data (like bookmarks, passwords and settings) on Mozilla’s servers. The recovery key keeps this data connected to your account. Without the recovery key, this synced data is erased for security. However, if you reset your password on a device that has a local copy of your data, signing in with your new password will re-upload the local data to Sync. On a device without local data, the synced data will be permanently lost." {Unquote}

   So if I "log out", my data will be erased, and I don't know where -
   or if - I have a local copy.  So far, a search hasn't found anything
   or I don't know exactly what to search for.  Catch-22.  If I could
   get back to the login dialog without losing the stored data, I HAVE
   a Recovery Key.

   What can I do?  Please help me, O'Obi Wan Kanobe!

I am using thunderbird client on arch linux. I am trying to filter by adding "Reply-To" as a filter. If i look into the source of the email i am trying to filter (i get like 100s of spam messages and only the Reply To seems to be from the same domain in the end) the Reply-To appears in there.

Any idea how to fix that? The other rules work fine, this one only seems to not work

When adding a new shortcut on the Firefox homepage, it moves previous shortcuts. I would like to arrange shortcuts to my liking and keep them in these same place as I add new ones further down on the rows. Is there a way to do that?

When Updating from v68 to the next version up, the sub-folders I had on my 2nd email account (POP) all disappeared on the left panel but still exists on windows explorer as I can see all the files.

1. Using v68.12 with 3 Email Accounts (POP). I only download 1 email account from Network Solutions for the past 5 years. 2. Email 1 - name2.domain, Email 2 - used when Soccer Coach, Email 3 - everyday email I get downloaded from Network Solutions. 3. When I tried updating years ago, from v68.12 to the v 78s or so, all the local folders I set up under Email 1 disappeared but the folder structure remain on the hard drive. 4. If I move the files out, then in Thunderbird, right click and create the folder again called Email - BW the folder is created and blank. 5. Then I shutdown Thunderbird and move the files back and then when I go back into Thunderbird I see some of the folders. 6. If I repeat this process, I see some of the folders and I don't see other. 7. I am trying to export the data out of the Email - BW folder, but the Using IMportExport NG in v68 doesn't match up with the version with Thunberbird v153. 8. Do I need to try to load Thunderbird 78 and try to import the files? I have the data file. I have the msf file I have the folder.sbd file It just doesn't show up on the left panel? Help Please.

I AM RUNNING WINDOWS 10 ON THIS COMPUTER AND I FIND YOUR UP DATES EITHER STOP FIREFOX FROM WORKING OR LOADING PAGES AND I AM TIRED OF THIS...

FIX YOUR BROWSER SO I CAN USE IT OF I WILL FIND ONE THAT WORKS. I AM SITTING HERE WATCHING WHAT USED TO BE AOL'S OLD LOGO MOTION...

''''PLEASE FIX IT OR LET ME KNOW OF A BROWSER THAT WORKS OR I WILL FIND IT MYSELF''''.

having issues with accounts in my Thunderbird. when I go to account settings and click through the different accounts None of the details are changiong on the right panel, and I can't edit anything as it won't save.. I also can not delete any of the accounts, it just does nothing. I was just trying to add an acocunt, and somehow have come across issues.

I have attached a screenshot to assist If anyone knows what's happening please give me some direction It would be much appreciated.

When I returned from a 20-day vacation, I had a message that “Thunderbird had a problem and crashed. We’ll try to restore your tabs and windows when it restarts….” I do not know when the “crash” happened. However, I have had problems with my 5 AOL email accounts and sometimes the 3 GMAIL accounts since August 20. The AOL accounts are the worst problems. Emails from one account are coming through under a different email account. This is happening with two accounts. Emails for one of the accounts is not coming through at all. I can read messages; but I cannot send any messages through any AOL account. Sending messages through the GMAIL accounts is sporadic in going through. Although my husband and I have separately checked all TB menu items, tools, & settings, we have not found the answer to correct my problems. Any help is appreciated.

starting about a month ago, my Firefox browser has become very slow. Sometimes now when I click a link (this happens about every 4-5 links) the spinning wheel of death appears and the browser doesn't respond. I have to force-quit

Thunderbird 153.1.1esr (aarch64) iMac macos Ventura 13.7.8

Hello,

When I start a new message, it's always shown 'Copy message to'. This has suddenly disappeared. (It puts copies into 'Sent'). I have 3 accounts set up; this seems to happen with all of them. I've probably clicked om something unusual, without noticing it. How can I get 'Copy message to' back again, please? Any suggestions? (I've tried clicking on things in Account Settings, without success.)

I see I've had a message from Mozilla saying 'Use 618307 to sign in'. I've been able to sign in and create thus message anyway. Is that normal, please?

Thanks for your help -- it's needed and appreciated.

All good wishes,

Roger Fern.

Roger Fern, Newcastle upon Tyne (England).

I like to know what is the problem at my e-mail setting? Since two weeks ago, when I sent a message, receiver could get my message, but there were no sent record in my Sent Message box.

For some reason, my Gmail page doesn't show the icons on top at all. Like the archive, mark as read, and the others on top of the mailbox contents. They show up on both Chrome and Edge, so this seems to be a Firefox problem.

Computer being used with issue: HP ProDesk 600 G2 DM (Windows 10, 16GB RAM) So can this be fixed or should I just use my phone for Gmail?