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I love Thunderbird. It is fast, robust and efficient. But now, every time I launch the app, it is in dark mode and it is difficult for me to use it because of my terrible eyes. How can I turn off dark mode ?

I use Thunderbird on Fedora 41 Gnome. Thanks in advance for your help.

I have been unable to sign in to google accounts on 3rd party websites for a while now. I'm using firefox develloper edition. i do not have this issue with normal firefox

every time i try to sign in i get redirected to https://support.google.com/accounts/a.../32050?hl=en

Heres some of the things i tried:

• Clear cache and cookies
• "repair" Firefox from the uninstaller
• Reinstall Firefox

To be honest it is quite a bit annoying and i cannot find a solution thanks in advance for any help

All of a sudden the font alignment in my inbox looks really strange, see image, i don't know what happened i didn't change anything, i did restart my computer this morning. I'm on a mac running Sonoma 14.7.1 , thunderbird 128.5.2esr (64-bit)

any ideas what's happening here? thank you!

About a month ago I began the process of upgrading from W10 to W11. In the process, several problems happened. One of the problems was with Firefox. After reading and trying many suggestions from the Mozilla site, as well as several other sites, and having no success, I posted my problem on this Mozilla support site and hope that there was someone who could help. There was. After several days of exchanging messages (suggestions, instructions and results - mostly about Profile), Firefox returned.

The other major problem is Thunderbird. I have downloaded a current version (128.5.2esr). I have run it twice and, each time, email was downloaded. So that part seems to be working. What doesn’t appear are the settings I have used and message folders I have created over several years. I suspect that the problems are Profile related.

Starting from Help in the Thunderbird menu, then Troubleshooting Information, then Application Basics, I see Profile Folder. On that line is a button labeled Open Folder followed by (Local Drive). I click Open Folder and File Explorer opens to a folder named ab3xaztm.default-esr. It shows that the folder contains 59 items, including 10 subfolders. All files and folders show a December date.

Following the path C:\Users\rsuth\AppData\Roaming\Thunderbird\Profiles\, in addition to ab3x…, there is another folder nlys3gkl.default that contains only 1 file, times.json.

Because of my earlier struggle – and eventual win – with the Firefox problem, I think that the Thunderbird problem might also be fixed in a similar way: Profile.

Slightly before the upgrading from W10 to W11, I made a copy of my Thunderbird folder. I think if I replace the currently active Thunderbird folder with the one I have saved, my Thunderbird problem may be over. However, I’m not certain that will happen and I’m not certain about the specific steps to take to make the replacement. (With my Firefox issue, there were a couple of small important steps I had to take to make it work, and those steps were explained to me by the person who helped me with my Firefox problem. So, after all these words, can someone point me in the direction to solve my Thunderbird problem?

Thanks for reading.

A couple of months ago Thunderbird started being very slow in multiple situations. I use POP3 and download all mails. I have fairly big mailboxes, some of them up to 2½ GB.

1) Downloading e-mails is slow.

But the worst is this one:

2) Clicking on unread mails first time. This can easily take 10 secs, where the app goes "not responding" and finally "Loading message...." With 10 new mails, it is a lot of wasted time.

3) Dragging mails from one mailbox to another Some of the same behaviour as above.

I have tried to compact mailboxes, but that doesn't help.

I am on release 128.4.1esr (32-bit), windows 10.

I am having a problem syncing my Thunderbird folders with iCloud. Every time I have to explicitly check that I want to subscribe to all IMAP folders in my iCloud account. Then after a short while a lot of folders get unsubscribed and I have to subscribe them again. I have experienced this instability with both Thunderbird and Betterbird as well as on Windows 10 and Pop_OS! 22.04. More people have reported the same issue, but no solutions have been shared:

• https://support.mozilla.org/en-US/questions/1441368
• https://support.mozilla.org/en-US/questions/1444029

Does anyone know how can I fix this?

I often open PDF links in Firefox. I can choose to open the PDF in a Firefox tab. If I leave the tab open and restart my computer, or look for that tab sometime in the future, I often see a page that says File not found (see picture). Somehow the page is being cleared out of the cache. Not sure if Firefox is doing this, Windows or some other program. Any ideas to keep these pages so I can see them in the future?

Hello,

I was at a friend last night and logged into my monzilla account on his firefox browser. To my shock all his passwords, over 300 of them, got added to my password. I just want to point out here that his passwords were stored locally without an account. As soon as I logged in it started syncing on my account. This is a HUGE SECURITY BREACH and should be addressed immediately. there should at least be a prompt or 2 making sure that I want to add locally stored password to my account or not.

If I had not noticed it at that time I would probably have gotten away with all of his passwords without me or him knowing. I had to manually delete the ~300 entries. makes you think how many times this already happened in the past for others.

Best regards, Remco

Thunderbird suddenly can't connect with my email servers. A box from Xfinity pops up: • Xfinity: Sign in with your Xfinity ID (for ***@comcast.net) • but when I do: Access Denied You don't have permission to access http://login.xfinity.com/login on this server. Reference #18bffcc317.1734841179.1c89c1f5 https://errors.edgesuite.net/18bffcc317.1734841179.1c89c1f5

Also Thunderbird error messages: • Authentication failure while connecting to your server imap.comcast.net And Thunderbird error message: • ~Connection to yahoo timed out And my Inbox messages don't show

Please help. I see no cause for this, didn't download anything today. Thanks, Lynn

duplicate of /questions/1480235 thread In Thunderbird section.

When I use my PC (main device) FireFox shows individual mail folders, on my iPad the default mail client as well as individual account folders has an 'All Inboxes' This is very useful as 95% of my mail will go to one account .... so having an 'All folders' account makes sure I don't miss a mail arriving on a less used account.

Is there a way to set this up on FireFox ?

Firefox kicks me out! My Mac works like a charme without any hardware problems. But now my favorite browser (FF) quits support. I'm amazed that a project like Mozilla does not care about sustainability. Any update in the software world must take care concerning downward compatibility - otherwise you exclude former users/customers. So why is ESR for Macos 10.9 to 10.11 not supported anymore? There are millions of Core2Duo-machines, that Mozilla sends to the trash. I'm extremely disappointed!

I’m using Thunderbird on a MacBook Air M1 2020 with 103 GB of free disk space and 8 GB memory. I’m using it primarily as a calendar and task management system because I like the reminder options in Thunderbird. I use local calendars. Thunderbird auto-updated to V 128.5.2 from V115.18.0 on 12/17/24 (I didn’t realize auto-update was set) and since then gets hung every time a reminder comes up and I either dismiss it or snooze it. I have to Force Quit Thunderbird to get the spinning beach ball to go away. I backup my computer weekly using Time Machine and tried restoring to 115.8.0, but was unable to restore my profile with my current calendar items on it. I got an error message saying that the new version of my profile (with my local calendars) is incompatible with Thunderbird V 115.8.0. Is there any way to get my current calendar info into an older version of Thunderbird, or better yet, create a fix so that it doesn’t get hung? If it's time for me to move to a different application for this use, just be honest. Thanks in advance for your advice and expertise!

I live in Peoria, Il USA. our service provider is Comcast. I use Linux Mint Cinnamon 21.3 ver 6.0.4. Just about a month ago, I found I was not able to send emails. I can receive emails easy, but not send on either of the 2 email accounts on my desktop computer. When I tried to send a message I received an error telling me I didn't have permission, so I took pictures of the error messages to the local Comcast office. They told me I needed to change my password.

    After changing my passwords, I tried to send an email to my alternate account and received a "sending message" notice.  I left it in sending message for over an hour.  I closed the sending message.  Then checked all of the account settings and preferences, and changed one setting to "normal password", and repeated the test, I receive the same results.  Using "Software Manager" I uninstalled "ThunderBird" then re-installed "ThunderBird" via  the gui.  I tried the same test, and again received the same results.

    I again went back to the Comcast office and reported my results, I was told that there were 2 other complaints about the same situation, I asked what their solution was and was told to just log into my Comcast Account online to send emails.  I asked them what did Comcast do that caused this problem, I was informed that they are just a sales office, I asked for a phone number for tech support and was told that they don't have a phone number to tech support.

    So, it seems I am on my own to fins a solution to the situation they caused, can you help?

    If there is any further information you need feel free to ask.

Thank you, Evan James

I have Mozilla Thunderbird Version 128.5.2esr on a desktop with Windows 10 Pro. This version of Thunderbird has the message pane to the right of the email list. I very much prefer the older style where the message pane is on the bottom (the full width of the window). Please let me know how to change the settings so that my message pane will be at the bottom.