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Since a few days ago, when I try to create a new message in Thunderbird, clicking the "Compose" button does nothing. However, replying to or forwarding messages still works.

I used to have an image (dark, stormy sky) in my new tabs, that appeared as a background to my grid of websites (8 columns x 4 rows). Suddenly, I haven't seen it today - just noticed that it's just black. Can't seem to find where to access the different images. Would like the path to find it, or learn if it's no longer available or if I can make my own. Thanks.

At least once a day I'll get a popup message that says my Earthlink password has failed and gives the option to Retry or Cancel. If I press Retry, the password works and I can download my email but the email alert sound keeps playing over and over until I have to shut down Thunderbird and relaunch it to stop it from doing that. I've had to disable incoming mail alerts. I've checked my email settings with Earthlink and they're all correct. I'm currently using version 128.12.0esr (64-bit) on Ubuntu but this has happened on multiple versions over the last few years.

Hi hi, I just did a complete reset to factory settings of my laptop (MSI), and a wipe of my hard drives too. After reinstalling Firefox (literally the first thing I did after setting up windows), it runs more slowly than before the reset (even for a basic search on Google/Duckduckgo). I am also unable to load any pages under the domain discussions.unity.com : the page loads forever, it's impossible to click on anything (even the hovering styles don't work), and I get a banner at the top of the screen that says "This page is slowing down Firefox. To speed up your browser, stop this page.". Also the memory usage for this page skyrockets (gone up to 4000MB??). I've disabled the 2 extensions I have (Dark Reader and Adblock Plus), restarted Firefox, restarted the computer, cleared the cache, even turned off the mozilla syncing, nothing worked. Any idea on what could be happening here? It's the first time in using Firefox for over 15 years that I've seen this happened.

Thank you for your time and attention <3

Hi,

I recently installed Thunderbird on a news Windows 11 computer. While setting up the account, I made the mistake of changing my gmail account from imap to pop3. After changing the settings in my account to allow this change, Thunderbird started downloading thousands of old emails. When I realized my mistake, there was nothing I could do to stop emails from downloading. Even after disabling pop3 in my account, the emails continued to download. Unfortunately, I haven't got the time or patience to delete thousands of emails one at a time. I tried uninstalling Thunderbird and reinstalling using IMAP instead of POP3. No luck. The emails continued to download.

Is there anything that can be done to stop this?

Thanks, Ed

Roughly every 2 weeks I backup important files to a external hard drive.

One of the things I always backup is my Firefox profile. I have been doing this for years without any problems.

I 7zip my profile and copy it to the hard drive.

I tried to do this yesterday (July 25 2025), and was getting access denied messages for files in the profile. So I tried to simply copy the profile. Same thing access denied.

I cleared the history, used wise disk cleaner, rebooted my machine and tried again. Same thing access denied when trying to backup or copy the profile.

I am assuming that this is happening since 141 because I updated Firefox since the last time I backed up my profile, and never had a problem previously.

Could anyone have an idea what the problem is? Thank you for your time.

When first setting up my email accounts, I accidentally created a false account that I cannot now delete. It was not fully set up and now I cannot delete it from the left panel. When I go to account actions, delete account is grayed out, how do I clean this up?

Hello,

I am running Thunderbird 140.1.1 esr on a Win 10 Pro laptop. In the past, when I inserted an image into an email, Thunderbird offered to resize that image. Now, it just inserts the image, even if it is very large, and doesn't give me that option anymore. So I need to first resize it before adding it.

Is there a setting that will allow the resizing, or has Thunderbird changed how it handles inserted images. I tried the "Advanced Edit" option, but those changes don't "take" and the image is inserted as is.

Also - when I do try to add an image - the inbox becomes the primary window and I need to "find" the compose page to see the email. That didn't used to happen either.

Thanks for any help!

TN

I updated Thunderbird without backing up my profile. All my contacts and emails not currently in my inbox appear to be .... gone :( Please help - can they be recovered? I've got a lot of brain fog and need clear instructions.

Hi there David

Not sure I'd you will see this... I cannot tell you the steps I took as I followed the path but I now have no emails on my old laptop either... Everything is gone...

Thanks Sally

How do I transfer my email contact list to another person. I knew how with the old Thunderbird, but it doesn't work with the new version.

Thank you,

Karen Walden bkwalden@diamondnet.us

Please send me a link to revert my Thunderbird version to one that supports image attachments resizing. Current version does not and there is no compatible add-on for it.

Since updating to TB 140.1 esr the hyperlinks in my emails (both in the text and signature line) are pink. I would like to change them to blue. When I go to Settings>General>Language and Fonts there is no "Colors" button under the "Advanced" button in the Fonts section.

Is there another place to change hyperlink colors in this version of Thunderbird? Or if there is supposed to be Colors button, how do I restore it?

Thank you.

I have 6 email accounts in Thunderbird (TB). 4 recently created IMAP accounts and two POP accounts.

I recently added an IMAP email client for my domain name. There already exists a POP account for this domain name and I’ve had it since TB came out (I used Pegasus Mail before).

The account names are displayed the same in TB except the IMAP account. "___@___.com" The above is the POP account and it only displays the email name: "___@___com"

"___@___.com IMAP" The above IMAP account also displays the word “IMAP” in the title.

I have over 46000 messages in 58 sub folders on this POP account and I want to keep all of them for now.

My biggest question is - when I Delete the POP account, "will TB also delete all the sub folders at the same time ?"

Right now, the Inbox on the IMAP account does not retain any messages. When I start TB, we know it auto checks all email accounts and downloads new mail to each account. Emails to my domain name go to the IMAP account first. When I open the Inbox in the IMAP account, I can see all the downloaded messages but only for a second. They disappear from IMAP and transfer to the POP account.

Every 10 minutes after that, TB downloads messages from all accounts again. This time any messages to the IMAP account can be opened & viewed. They can also be deleted or moved to another folder. 3 to 5 minutes later, they ALL appear in the POP account. Any messages not deleted remain in the POP account Inbox. No messages remain in the Inbox for the IMAP account.

I know I need to move all the folders and sub folders from the POP account display to the IMAP account display. This is going to take a while. Like I said, the Inbox will not retain any mail, it automatically moves to the POP account after 3 to 5 minutes.

I have moved the ‘Sent’ mail folder to the IMAP account and started on some of my Archives files. The first one I moved from POP to IMAP was a ‘Sent 2008-2015' folder. This folder has 5363 messages. I just did a ‘drag and drop’ with my left mouse button from the POP Archive folder to the IMAP Archive folder. It worked like a charm. Took a couple of minutes and you could see TB counting off the messages being moved at the bottom of the screen.

Seem like TB was teasing me, it will no longer copy large count sub folders with ‘drag and drop’. I think that first folder is the largest. TB will sometimes create the proper folder name but not move any messages. I have to go in and select 100 or so messages at a time and 'drag and drop' them into the newly created folder in the IMAP account. Sometime I ‘drag and drop’ and TB doesn’t do anything. It going to be tedious to get all my email moved from POP to IMAP. Of course, I will do it if necessary but is there some other method of moving the sub folders from the POP to the IMAP account that is faster ?

I created IMAP accounts for my two other POP accounts and I only had to move the Inbox mail from POP to IMAP. One of the POP accounts only had the Inbox and Trash folders and the other one had those 2 plus five sub folders. One of these folders have 3381 messages. Had to move them 100 or so at a time. The other 4 folders had a small number of messages and transferred easily. Deleting the POP accounts at that point was no problem.

So, again, my biggest concern is deleting the main POP account and TB deleting the sub folders. If I have to get them moved before deleting, so be it.

Thanks for any help.

I am running an iMac that is about eight years old.This afternoon my Firefox browser was taken over by a "warning" from "MacOS security center" that I should go to THEIR macOS support site to get my system unfrozen. The number they give is 1-877-xxx-xxxx. I cannot get this intruder to go away, even by restarting the computer.