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Important update! On March 14, 2025, a critical root certificate in Firefox will expire. If you’re still using an older version (before Firefox 128 or ESR 115.13+), it’s crucial to update to Firefox 128 or newer to avoid issues with add-ons, DRM-protected content, and other features.

For full details, check out Update Firefox to prevent add-ons issues from root certificate expiration.

If you have questions about the update or need help with the process, this is the place to ask! Whether you’re just starting or you’ve already updated and want to share your experience, we’d love to hear from you.

Let’s come together, share tips, and ensure we’re all prepared. Drop your questions or insights below!

Good morning, I had asked a question early on Saturday, but was unavailable the rest of the weekend so just now responding to associate Corey Bryan's answer. I had gotten a message that I am using an unsupported version and they recommend downloading the latest stable version.

He said it appears that I'm on the "Release" channel and most likely want to be on the ESR channel. I also mentioned that I am a cave-man when it comes to anything computer and am very skittish about making any changes as I don't how to straighten out any errors that might occur.

He asked me where I installed Thunderbird from and the answer is that I don't know. It was an IT guy that did it many years ago.

So I guess my questions are, if I've been using this version for years, do I need to or should I update it? If so, if I click on the latest stable version of Thunderbird, will that change anything on my computer, aside from getting the newer version of T-Bird? And will my e-mails in Thunderbird look any different?

Thanks very much for the help. Tony

I understand that Postbox, based on Thunderbird, will never be updated to become compatible with Apple silicon chips. Therefore Postbox will cease to work when Rosetta will be deprecated on macs. Consequently my question is where can I find directions to import messages, filters, and preferences from Postbox to Thunderbird?

created new accounts but sub-folders different, missing, new, & new icons(?)

For many years I have had 2 Accounts in Tbird. They are POP. I just created two new accounts, and am confused by some differences in appearance. These are IMAP. Do IMAP accounts populate the sub-folders based on a structure present in the IMAP provider?

1) there is a new sub folder "All Mail"

2) No Junk folder. There is a Spam folder. Did some idiot change the name in an update to Tbird, just to fark with long time users? If so they did a poor job, since the Account Settings still has a tab for "JUNK Settings" and the toggle asks where to move the JUNK. Creating synonyms is bad practice, because nobody knows if they are in fact synonyms. One would presume they are not.

3) In the index listing of accounts, each account has an icon to its left -- concentric circles with a padlock. And I have not noticed that icon before, I'm wondering if my old accounts suddenly have a different icon (which strangely matches the new accounts' icons). The sub-folders all have unique icons for each type (Inbox, Sent, etc)

In choosing where to place sent mail, there are two toggle choices to Place A Copy In: 1) "Sent" folder on { [circle&lock icon] ACCOUNT_NAME 2) "Other { [SentFolderIcon] Sent on ACCOUNT_NAME I don't grasp the difference. Would 1) keep the messages on the remote IMAP system? I notice that my old POP accounts are using option 1) & mail is kept locally.

3) The new accounts have "greyed out" italicized subfolders "Folders" and "Labels." Are these associated with being IMAP, or did some Tbird update add them? What are they for?

A few weeks ago after an automatic update I ended up having Thunderbird version 131.0.1 installed, I have no idea how this happened. On opening I get a message telling me I shouldn't be using a beta version and that I should revert to the latest general release version (128.4)

Today when I had some free time I downloaded 128.4 and installed it. On opening it it says that I can't use a profile file from a later version with the earlier version. Is there a way to recover from this WITHOUT having to set up the whole profile again from scratch.

Meanwhile I have done a system restore so I am back with 131.0.1 It has not given me any problems so far. Is there a new general release version imminent that will get me back on track?

I would appreciate any help I am not a computer expert, just a user, and find Thunderbird a very good email client.

David Gould

Hello, I've got the french version of Thunderbird on my laptop. I want to have it now on my smartphone Android. But impossible to find the function "move to mobile" in the parameterss... Please help me !

I can still receive and send e-mail from my phone and tablet (using BlueMail or GMail), but I can't do either from my Windows laptop with the new Thunderbird 60. If I reinstall the earlier version, (Thunderbird-Setup-17-0-8.exe), everything works. Going to Yahoo to change my password, as one solution suggests clearly does NOT address the problem, as the only thing that does not work is Thunderbird.

Yesterday I upgraded my PC from Windows 10 to 11. Today I discovered my Local Folders are not visible. Searching tells me the messages still exist, but TB does not show the folders. I did the same upgrade a month ago on a laptop (Windows 10 Pro to 11), no problems. I didn't externally back up the messages as I am a dinosaur and don't know how, but at least they are still on the hard drive. Thousands of them though so I need the local folders back. Tried all the fixes I can find on the Community Forum, without success. Can anyone help please? Bob

I am trying to get my contacts from Windows 10 Mail , to Thunderbird , first off , i cant find the contacts in Windows 10 mail ( i can't find the actual CSV file/folder/location , second , if this is a common issue why doesn't Thunderbird make it easier to transfer contacts , just like all the other email programs do ??? , i am confused as to why its such a pain , i am also not impressed with the speed Thunderbird has in actually sending emails , Widows 10 Mail is 10 times faster at actually sending the mail.... , the only reason i was going to switch to Thunderbird was so i can send more than 1 picture at a time in a email , which Windows 10 Mail has a problem doing and its taking forever for support to help , but if i can't easily get my contacts transferred , i am back to square 1 ,

I need a step by step in getting my contacts saved/found in Win 10 Mail , and get them into Thunderbird ... any help that actually explains the entire process is needed , as some of the links i have seen in other posts just say to save the file , but it does not tell you where the file is and where to save it (some said something about Office ???) , it makes no sense why this has to be so complicated , all i should have to do is go to "Import Contacts , choose the email program they are in , select it , and import it , that is how every other email program does it , if this can't be done without spending hours trying to hunt down the info , maybe it was a bad idea thinking this is a good email program , so far , i am not impressed , if it gets better then fine , but if it continues like this , its getting un-installed and was a waste of my time

I had to restart my Mac. When TB restarted during relaunch of the Mac, it was like TB starting fresh. It didn't display my email accounts, or my folders with saved emails, etc.

I quit TB and looked for it in my Applications folder - and I found two versions of TB. Inside the Thunderbird folder was version 140.9.0esr. Outside the Thunderbird folder was version 150.0. See attached screen grab.

I thought I should try launching the newer version (which was outside the folder). So I moved the 140.9.0 version to the trash, then launched the newer version – and it had the same problem. It looked like I was starting TB from scratch.

Next I quit TB (the newer version) and moved the older version out of the trash and back into the TB folder and double-clicked on it. A dialog box popped up saying that the file is damaged and can't be launched.

So I tried launching the newer version again, and it still looks like starting from scratch.

I really hope somebody can help me solve this. I can't access any of my email accounts or any of my stored emails. I use email for work (as most of us do), so this is crippling me.

Thanks in advance for any help.

In Windows 11, the Address Book is accessed via an icon on top left of the TB main page or Alt+2. In Windows 11 is there a similar key combination to view the folders below Local Folders?

Dear Thunderbird team I am an avid user of TB (home desktop Windows PCs), but I have been resting on my laurels on v78 for a few years now. I know, shame on me. I would like to upgrade to a stable "modern" release (emphasis on "stable" please). Can you please advise if I should aspire to end up on 115 or 128, and how I might get there ? From reading some older blogs, there is advice that says.... first go to v91, then v102, then v115, and so. That seems a bit tortuous, but I am happy to do so if that is still the recommended approach.

Also, can you advise on how I manage my Profile through all this, do I need to do various exports/imports as I move through these different versions, etc.

Many Thanks

For a few days a banner persists on the lower left of the message window. It obscures content. ""Upgrade to Thunderbird Release"" I have checked twice to make sure there is no update available. Why does this annoying message persist after I run the update. I have rebooted the application multiple times. I do not want to click "Learn more" on the annoying banner promoting "Get monthly updates. with new features and improvements in the new Thunderbird Release" Is it malware? If the application is up to date why are you forcing me to "Learn more"? This is not a good user experience. My MacBook Air is up to date. Thunderbird release 128.11.1esr

I am on 115.13.0 (32-bit) yes, and oddly it says updates disabled by system admin (that's me). I have no idea how to change that. No way I took steps to disable thunderbird updates. I found only one thread on how to reenable but it was very vague and the OP did not arrive at a perfect fix.

I recently got a new computer, Apple iMac. I'm trying to transfer all my bookmarks I have on my older HP computer to the newer computer Apple. I downloaded the Firefox browser to the iMac. I see where there is a link to transfer bookmarks when I loaded the browser. But, when I click on the link, nothing really happens? There is no transfer of my bookmarks for my old computer to the newer computer. My OS with my older HP was Windows 7. My OS with my acquired Apple is Monterey. Can someone be of help with transferring bookmarks from one computer to another? I have many bookmarks so it would be very helpful to be able to make that transfer. Thank you.

The first problem cropped up immediately: Thunderbird has done a pretty good job for years of recognizing my email preferences for Inbox, Trash and Junk; now it no longer delivers email to my Inbox or Trash at startup. Almost all of my email goes to the Junk folder, including that from whitelisted senders. All of my individual spam filters and my whitelist are set to act when email is received, but I have to run the whitelist manually to get it to work (sometimes more than once). The only way I can get things into the Trash folder is to put them there manually, as TB apparently has forgotten everything it learned about my email preferences. I did take the opportunity to update my Whitelist (though to no avail), so I guess I'm sort of glad that I was goaded into doing so. But it hasn't helped.

As of tonight, I can't write or reply to an email or edit an email draft because TB locks up while it is "Copying messages to Drafts..." I've had to close TB ten or twelve times, and I've not been given the opportunity to make a bug comment during the closing routine.

I have emptied the TB cache in hopes that doing so would clear up these issues. Though that works well in Firefox, it didn't help with these problems.

I also am not too happy about the disappearance of the File Edit ... folder bar and its being replaced with a hamburger drop-down menu at the upper right, but at least it will suffice once I've unlearned almost thirty years of doing things a certain way.

I really don't want to stop using Thunderbird. I like the program, and I'd hate to have wasted the two solid weeks it took to get Yahoo! Mail to acknowledge its existence and let me connect to their service, which I did under duress. Not that I'm a masochist or anything.

Windows 11 Ver. 24H2 (OS Build 26.100.4351) Thunderbird Ver. 139.0.2 (64-bit) HP something-or-other tower computer, vintage 2021

I have installed thunderbird, but the sub folders in my webmail are not downloading into the thunderbird application. Thunderbird automatically did imap when I added my accounts. I have no idea what the problem could be. Thank you for your help.

1. How to move mail between two different Macbooks with different OSX and different versions of Thunderbirds?

How do I move my email profiles (there are several) from an old Mac to a new one, when the old Mac can't be upgraded anymore and the Thunderbird versions don't match?

Old Macbook OSX Monteray 12.7.4 can not go any higher on OSX due to hardware not being compatible Thunderbird 140.5 Oesr 64 bit - don't know if it can be updated or not, but expect not. Minimizing run time as much as I can because the fan is going nuts and I think the battery is going - gets very hot.

I copied all the different profile folders from the Old Mac to an external drive. However, I don't think I can just plop them in to the new Profiles folder on the New Mac, given the Thunderbird versions and OSX version don't match.

New Macbook OSX Sonoma 14.1 Thunderbird 153.0.2 aarch64 Not updating to Tahoe yet because then I can't use my 2019 MS Office products - need to save up to update those first

All I need is e-mail - not calendars, contacts etc., although it might be nice to to have those Thanks in advance

2. How to .pdf old emails (With attachments) Also, the profiles folder is huge (219 GB), with multiple profiles and I want to save old emails (with attachments) into .pdf and appreciate advice on what .pdf converter/file converter would be best. It doesn't have to be free. It does need to respect my privacy.