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3 Days ago Thunderbird, Firefox and Windows 11 all updated at the same time. Now, every time I close and reopen Thunderbird, it takes me back to the "Setup your existing email" page, and I have to create a new profile and start over. I then restore my email and settings, etc. via a backup, only to have the same thing happen the next time I open Thunderbird. Firefox is being similarly affected, but not quite to the same degree. I don't lose my bookmarks, but all my settings have to be restored. I'm using Bitdefender Total Security, and have turned everything off, and the same thing happens. I've been using all these programs for years, and Windows 11 for over a year with no problems. Please help.

I pressed download but I don't know what to do next. I signed up for the newsletter and gave a donation. I don't know where to find the app or how to complete the installation. Thank you.

I have the updated version of Firefox but when I go to either Facebook or Instagram pages, I get a message saying "This version is no longer supported, please upgrade your browser." How can I fix this?

Please be advised that when I tried to download Thunderbird program using following URL, I got "404 Not Found" Error. URL has miss spelling "ja" should be "Ja-JP-mac". https://www.thunderbird.net/ja/download/

（Wrong） https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/128.4.3esr/mac/ja/Thunderbird%20128.4.3esr.dmg

（Right） https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/128.4.3esr/mac/Ja-JP-mac/Thunderbird%20128.4.3esr.dmg

Good day!

I download 64 bit exe on win 10. I run it, it unpacks, asks for what user I want to run TB as, I pick one, program closes, I never see it again. Done it multiple times, nothing. App just silently refuses to install

I'm moving from iMac 12.7 to Mac-mini 15.1 and Thunderbird's old files cannot be imported. So, I deleted the failed Thunderbird app in the new Mac-mini and download a new Thunderbird to the Mac-mini. I made sure it's the desktop version with US English for Mac before hitting the download key. After downloading the Thunderbird 128.4.3esr.dmg and double-clicking the file and moving Thunderbird into the "Applications" directory. This last step seems to go on forever, that is, when I tried to eject the Thunderbird's download, it claim the download is NOT finished. What did I do wrong, and how to fix this problem?

Roger (magian@att.net)

Because my previous Thunderbird profile appears to be corrupted, I am trying to reconstruct it without too much duplication of effort. I have started with a virgin profile and added 3 mail accounts by way of the account wizard.

1. One of the accounts is an iCloud (Apple) account. Thunderbird offered to add my iCloud "Reminders" to Thunderbird's calendar, but the resulting entry shows a yellow triangle with an exclamation point, which seems to mean that it cannot be synced. The corresponding iCloud mail account appears to sync without problems. What must I do to enable the "Reminders"?
2. I also need to import the mail from the "Local Folders" in my old profile. Under "Tools - Import", it looks as though selecting "Mail Messages" will import all mail, which will likely result in hosing my profile again. How can I import *only* the mail folders form my old "Local Folders"?

I've been using Firefox for Android on multiple devices for many years now. I have poor eye sight and I end up zooming in on pages a lot, but when I do that the text doesn't auto-fit to the page so I end up having to scroll side to side as well as up and down constantly and it makes reading web pages a very frustrating chore. how do I get the text to auto-adjust to the new zoom level so it fits on the screen?

Hello I have a problem where I get an error message "Unable to use profile when you launch an older version of Thunde...."

I noticed that I had 2 versions of the program installed, 115.16.0 and 128.3.3. Thunderbird must have been running okay up to v115.16.0 as I had to do manual installs from then to now. Initially there seemingly was no indication of any problem. I'm not sure how many manual installs I did as it was only 15th Oct that this issue started. I was on holidays for 6 weeks Thunderbird was unused between about 28th Aug to 15th October. So, my Thunderbird was running at 115.16.0. I tried to uninstall 115.15.0 but it said I had another version that needed to have the uninstall completed by rebooting the PC. I did that but 115.16.0 still remained. I uninstalled 128.3.3 successfully. 115.16 still wouldn't uninstall, so I used a program to cleanup all of this version. I reinstalled 128.3.3 and still get the same problem I started with. "Unable to use profile when you launch an older version of Thunde...."

How can I get Thunderbird running? Regards Alllan

after latest update nov 12 128.4.3esr 32 bit my wife can not access our same email server mail.patokalakemarina.com. Gets security alert of invalid certificate. When I try to add an exception says is good and don't need an exception.

My 64 bit machine took the upgrade ok, no alert, and her android phone still accesses. Every box is checked the same as my 64bit. How to roll back an update?

Please advise if this was a bug that occurred after your 11/12 Tues. update. It appears that a patch of some sort was sent on 11/16 Saturday, but it did not help with bookmarks. I hope I don't have to use a different browser in order to save bookmarks or favorites. I also lost my Norton and Ad Muncher & had to re-set those again. I hope you have a fix for this as Firefox had a problem similar to this in late October '24. I really appreciated the stability prior to this. Thank you. P.S. What does this mean on my Firefox Settings page? Information "Your browser is being managed by your organization."

Ich habe bei einem Update vor einiger Zeit versucht, Firefox auf den neuesten Stand upzudaten. Jetzt erscheint die Seite nur auf Englisch mit Bookmarks usw? Was kann ich tun ?

Here's one for any techies. For updates (or download). does Firefox for Windows use AppX Deployment Server (dll) directly or via maybe Windows App Installer? I don't understand any of this stuff but the dll is faulty and is destroying every Windows app which foolishly tries to update with it. I beieve it's just done for Windows App Installer among its many scalps I can't system restore, probably due to a dodgy disk drive. I don't want to lose Firefox. Help!

Since the latest update Thunderbird is extremely slow to launch the mail pane always comes up with no messages for about 7 seconds after that it works but is often not very responsive Why ?? I have disabled all add-on's and recreated the msf files