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Today for the first time after the latest update 127.0 (64-bit), my many firefox pages and tabs crashed and closed and a pop up to send crash report.

So I have fired up firefox again to find only a single page opens up, I have lost probably 16+ pages with multiple tabs on each, been like that for months, I have 32GB memory so there is normally no issues or slowness. However after the crash, even though only a single firefox page is open, windows task manager shows Firefox (20) and if I expand the task, I can see each firefox is taking lots of memory.

So it looks like the old session pages/tabs are still there somewhere but not accessible, I would like to get them back if possible. I went through reseting it to default, disabling the add ons etc but nothing has worked.

For months I was experiencing the problem of "Thunderbird not responding" occasionally. It was a short duration issue (a few seconds to a minute). I reinstalled Thunderbird several times without success. I read almost every comment available online about this problem and I tried many ideas and recommendations I found without success. Most recently the problem became so serious that it was not a nuisance any longer. It was nearly impossble to work waiting for minutes to open an email or to continue typing while preparing a message and being interrupted by the problem I am describing. I ran Thunderbird in safe mode and determined that none of the add-ons is causing the problem. I turned the firewall OFF and determined that firewall was not causing the problem. I then decided to run Thunderbird in Offline mode and found that the program works normally. Then while in Offline mode I decided to download more messages and the program asked me if I wanted to switch to the Online mode. I said yes. New emails were downloaded and without going back to the Offline mode I was able to work normally without any occurrence of the "Thunderbird not responding" problem. I have been using this workaround for several days now. I download a number of eamails. I try working in Online mode and I cannot do it. I switch to Offline and work fine. I switch back to Online mode and I don't see the problem any longer for the whole day. Do you have any idea as to the origin of my proble? I am running Thunderbird 115.10.2 64 bit on Windows 11. I had the problem originally using Lenovo T490s and more recenlt Lenovo X1 Yoga

Automatically hide taskbar in desktop mode => Enabled Firefox => Maximised When cursor is moved to outer edge of screen, taskbar should unhide (Expected behaviour) but in this case it remain hidden (Reality). Firefox along with all other spinoffs give same result. Chromium based browser works perfect, and taskbar automatically unhide itself.

As OLED screen have became common as monitor, Taskbar auto-hide is must. If this issue cann't be fixed I may have to change my primary browser which I used for almost 15 years.

Kindly, look into it. If Chromium can do it, why not Firefox.

I am trying to reach an internal company website ([URL]), with a certificate chain rooted in a company certificate authority. This works fine in Chrome, and worked in Firefox on my previous computer. But i recently got a new machine, and something somewhere is not quite right. I get an error message looking like this (between the ~~~s):

~~~ Someone could be trying to impersonate the site and you should not continue.

Web sites prove their identity via certificates. Firefox does not trust [URL] because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates.

Error code: SEC_ERROR_UNKNOWN_ISSUER

View Certificate ~~~

If i click on the error code, i get these details:

~~~ [URL]

Peer's Certificate issuer is not recognised.

HTTP Strict Transport Security: false HTTP Public Key Pinning: false

Certificate chain:

[certificate]

[certificate]

[certificate]

~~~

If i click 'View Certificate', i get a chain of three certificates:

1. Subject common name = [certificate]
2. Subject common name = [certificate]
3. Subject common name = [certificate]

If i go to Settings > Privacy & Security > View Certificates > Authorities, i can find both the [certificate] certificates. As far as i can tell, they are identical - i can open the certificate from 'View Certificate' and the corresponding one from the certificate manager and flip between tabs, and all the details are the same.

I am using Firefox 120.0, via a flatpak, on Ubuntu 22. I have given the flatpak access to /etc/ssl/certs, where my company's internal CA certificates are located.

To me, this seems like it should all work. The server has a certificate signed by an internal CA, which is signed by another internal CA, and both those internal CA certificates are in my certificate manager. So what is going wrong? Is there any way i can debug this?

Started getting error April 10. I have SSL/TLS and Oauth2 set for Thunderbird account server and smtp. Looked thru lots of web messages - no joy. Via web browser I can connect to my Yahoo email without issue. My gmail account on Thunderbird still works fine (with its unique third party password). I am on current Thunderbird release 115.9.0 (64 bit). I disabled the only add-on that Thunderbird was using. Windows 11 Pro which is up to date. Plenty of open disk space. Have rebooted my PC multiple times.

Looking for suggestions Thanks Bob

All of our "read" emails, --from all of our accounts -- have suddenly disappeared. All of the folders and subfolders are still present. We still get new email, but as soon as we read it, it's gone. We have had these same email accounts for years and have not made any changes. In Account Settings --> Synchronization & Storage --> "don't delete any messages" is checked. "Read" messages are still on our server.

So, 1) Why did this happen? 2) Is there any way we can get our messages back in Thunderbird?

Hello,

I just installed the latest release of Mozilla Thunderbird (24.4.0) and I'm trying to create a "Vacation Response". I read on the Mozilla Support site:

Another option is to create a Message Filter and respond to all incoming messages with a template.

(see https://support.mozilla.org/en-US/kb/vacation-response?esab=a&s=out+of+the+office&r=3&as=s )

I've created a template and saved it and then I tried to create a message filter. However there is not an option to "Reply with Template" in the list of choices for the action to perform. I see action choices, for "Copy Message To", "Move Message To" and "Forward Message To", but not "Reply with Template".

Why is it missing and how to I get it to appear?

Thank you for helping.

Every time I start Thunderbird, I get the "System Integration" notification box even though the "Always perform this check when starting Thunderbird" option is NOT checked. Please let me also clarify, I DO NOT want system integration. Therefore, I have unchecked all boxes that are not greyed out and chose "Skip Integration", since there is not a box for "Do Not Integrate". Can someone please tell me how to stop this aggravating box from continuing to show up, without integrating Thunderbird or resorting to a different email client.

I am running: Operating System: Windows 10 Home Thunderbird: 45.5.0

Changed IMAP to POP. Now I have errors, such as "msgFilterRules...Conflict.dat. Deleted all my message filters, but this message STILL pops up.

I also have popstate-1.dat & popstate-2.dat 2 Junk folders, 2 Outboxes..

I have screwed this up somehow....

I have recently added a Microsoft exchange account to Thunderbird. I am able to connect to and receive emails through imap, but I cannot send emails. The error I get is a 'Login Failed' error with the message 'Login to server smtp-mail.outlook.com failed.' but I have double checked that my login information is correct (and reset my password and tried again). I can also happily send emails from the webmail and from a desktop copy of Outlook. I have tried all the suggestions in the 'Cannot send messages' troubleshooting article with no success.

My outgoing server settings are:

Server Name: smtp-mail.outlook.com

Port: 587

Authentication method: Normal password

Connection Security: STARTTLS

This is a Microsoft Exchange email, I am running Thunderbird 52.9.1 on Windows 10. Any suggestions on what the problem might be?

Having trouble with my Charter Spectrum mail account. I am able to receive e-mails, but cannot send them. When I send a mail, I get the "Login to server mobile.charter.net failed" message. However, I believe I have the correct setting for SMTP server. Charter Spectrum says I should have mobile.charter.net set as the SMTP server, port 587 selected, SSL enabled, and the authentication password should be the same as my IMAP incoming for the account.

So when I get this message about login to server failed - I re-enter the same account password, and get the same message result. Why would I be able to receive e-mails, but not send using the same server and password?

I was able to go onto Charter Spectrum website and login and send and receive e-mails from their web mail app. Although, I hate using it, and would much rather use TBird.

Thanks in advance. C.Bariou

When I click on account setting I get a small box labeled account settings with one button with a drop down arrow which works and gives a selection of: Add an account mail account, add chat account, add feed account,add other account or remove account. I cannot see any other settings

Subject: Account Settings -> Server Settings Occurrence: after update to 52.1.0 (32 bit)

My default setting was unchecked 'Automatically download new messages' and checked 'Fetch headers only'. After automatic update to 52.1.0 I could no longer download full emails from my email server by clicking on 'Download the rest of the message' hyperlink. However option 'Get selected messages' works and is active (available) from the start. I know this bug (inactive 'Get selected messages' after opening of Thunderbird) was on the Mozilla's back burner since ancient times :).

Setting opposite to default: checked 'Automatically download new messages' and unchecked 'Fetch headers only' loads emails without the problem but is potentially unsafe.

My contact is on Hotmail. I can receive an e-mail from them. When I replay, it is returned to me with the following: This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: [email removed]@hotmail.com SMTP error from remote mail server after MAIL FROM:<[email removed]@earthlink.net> SIZE=3240: host mx4.hotmail.com [104.44.194.236]: 550 SC-002 (SNT004-MC10F22) Unfortunately, messages from 209.86.89.69 weren't sent. Please contact your Internet service provider since part of their network is on our block list.

My default font is Calibri. However when writing messages the font often changes to Times New Roman. This happens especially after indenting a paragraph. It also often happens right from the start when replying to emails.

Hello,

After upgrading my Thunderbird install to version 60.2.1 on my Xubuntu 18.04 machine, I cannot access my mail anymore, because there seems to be a problem with passwords.

Symptoms:

- When starting Thunderbird, I get an "Enter your password" box for each of my accounts even though I had my passwords saved.

- When I go to Preferences -> Security -> Passwords -> Saved Passwords, the list is empty.

- When I try to enter a password and save it, it does not actually get saved and Thunderbird will ask again soon after.

- The following line is logged to console a whole bunch of times:

JavaScript error: jar:file:///usr/lib/thunderbird/omni.ja!/components/crypto-SDR.js, line 179: NS_ERROR_FAILURE: Couldn't decrypt string

Other findings:

- Downgrading Thunderbird to 52.7.0 fixes the problem. The old saved passwords just reappear again and Thunderbird has no problem logging in.

- Starting Thunderbird 60.2.1 on a Windows 10 box with exactly the same profile folder works fine. It can read the passwords and access my mail accounts.

Can you please tell me what to do to fix this, so I don't need to keep using an old version of Thunderbird just to access my mail?

Thanks,

My problem is that Thunderbird has a fault with displaying the message list. I have four separate email accounts set up. When I click on an inbox all I can see is pink and white diagonal stripes where the list of messages should be displayed. However, on one of the accounts it shows a small selection of emails that were the result of a search I did just before the problem. I can fix this by going to the inbox properties and clicking 'Repair Folder' but if I click on another mailbox and go back to the first one I have the blank list (or the search list) again. Is there a way to fix this? It's been working up to a day or two back.

Hello, I've been using Thunderbird since it first came out may years ago and have been a satisfied user. Sometime in the past year, after one of the Thunderbird updates, Thunderbird became EXTERMELY slow to open. It takes over a minute. I have looked for solutions here for the past year...no luck (I've read through most all of them here, that have to do with slowness of Thunderbird opening, as well as on Reddit). I've tried basic troubleshooting e.g. clearing Thunderbird cache, increasing cache to huge size. I've seen references to the slowness being related to "multiple calendars". I don't use calendars on Thunnderbird and went as far as to delete/disable the default one that was there. Still no improvement. I know its a Thunderbird specific problem since:

a. I don't have this slowness opening any other program on my Mac (opening it or using it) b. I don't have a problem with performance of Thunderbird once it finally opens c. It all started in 2022 immediately after one of the Thunderbird updates.

I am on: Mac Air M1, Ventura 13.2, 16 GB Ram Thunderbird 102.14.0 (64-bit)

I hate to ditch Thunderbird after using it all these years and being a very early user since it came out, but I am at wits end. Any help is appreciated. Thanks for any help in advance!

Ok, last week I migrated my Verizon Email to the new AOL/Verizon email set up. All went smoothly. I was sending and receiving no problem. All of a sudden, I am not sending or receiving. I can get mail from the AOL.Mail site, but can not get from Thunderbird. I have a G.mail Acct using Thunderbird and it works fine. Any idea why the new Verizon/Aol might be stumbling over Thunderbird? When I try to get mail it just hangs, when i try to send i instantly get this message...Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.verizon.net was lost in the middle of the transaction. Try again.

Thunderbird crashes regularly. I have determined that it might be due to RAM. When Quickbooks is open, Thunderbird will crash almost all the time. If I close QB, it is fine. I have an HP desktop w/ 8GB ram. What I don't understand is that it started doing this recently, but never used to crash. Is TB using more ram now since the latest releases? Any insight would be appreciated.