All Products Community Forum

Bonjour, Nous avons un problème avec l'utilisation de Thunderbird. En effet la boite des messages envoyés reste vide malgré les mails envoyés. Si toutefois nous envoyons un mail depuis une autre plateforme celui-ci apparait. Pourriez vous regarder car nous avons vraiment besoin d'avoir les mails envoyés.

I would like to donate .. i really would .. but .. I use PAYPAL for donations, and when I try to donate, the first thing you do is ask questions I'm not going to answer. I have an account already .. seriously that should be enough to give you money. OR if i go to paypal, have a donation link there.

Is it possible to make a donation to Mozilla without providing so much personal information? I got a message on Firefox today asking for a donation, but when I tried to do that, I was asked for my home address. It's a general rule of internet marketing that people who use the internet would rather do anything than pay for something, so it's bad psychology to impose unnecessary conditions when you're asking for a donation. I don't have to provide my home address when I make donations to other organisations, so why does Mozilla need my home address? I apologize if this is the wrong place to ask this question, but I can't find anywhere else to ask it!

Thanks,

Shaun.

Hi there, I recently switched to thunderbird and it's been working great on Windows desktop but try as I may I can get it to work on android. I followed the prompts to export the settings and that all seemed to work but the app won't connect to the incoming and outgoing servers. I've checked and the details are the same as the desktop (via Bridge) but it just says failed to connect every time.

I'm also only showing an outbox and no other folders in the app. I searched the forum and found others with this issue but no solutions. Is this a dead end and I'm better off going back to Outlook or is there a solution to this?

Thanks in advance 😊

I had to install Windows 11 fresh because of multiple issues with my PC (I upgraded from 10 to 11 6 months ago). I installed Thunderbird fresh, and am trying to get it to see my existing data with is on my D drive. I browsed to the folder in Account Settings, but it's not showing up. I have years of mail and don't want to lose it.

There are too many options in the help for me to know which are actually related to my situation. I thought I was ready to do this, but am surprised at how difficult it is compared to the last time I did something similar.

Any help, even just pointing me to the right place to look for help, is appreciated!

Thanks!

I signed into one of my financial accounts and it said the sign in was with firefox windows 10. I have windows 11 on my computer. Is this a security issue? Fire fox says i am on the latest version

Have tried so many times to transfer from old laptop to new laptop, never works. Have watch the youtube videos and followed this. Can not get it to work. Just want the emails from the old to the new laptop Thank you

Method using a transfer device On your source computer Connect a device for data transfer, either a local one such as a USB flash drive, or a remote storage drive. Click the menu button Fx57Menu, then click Help and select Troubleshooting Information. Locate the "Profile Folder" entry, then click Open Folder. Your Thunderbird profile folder will open in Windows Explorer. Close Thunderbird. From your Thunderbird profile folder in Windows Explorer, go up three levels. Right-click on the Thunderbird folder and select Copy. Right-click the device you are using to transfer your data, then select Paste. If you are using a local transfer device, remove it safely from the source computer. Note: This steps can also be used to create a backup of your Thunderbird profile folder.

On your destination computer Connect the same transfer device you have used before to copy your Thunderbird profile folder from the source computer. Right-click on the copy of the Thunderbird profile folder that you created on the transfer device, then select Copy. Open Thunderbird (Close the account setup window if it appears.) Click the menu button Fx57Menu, then click Help and select Troubleshooting Information. Locate the "Profile Folder" entry, then click Open Folder. Your Thunderbird profile folder will open in Windows Explorer. Close Thunderbird. From your Thunderbird profile folder in Windows Explorer, go up three levels. Right-click inside the folder, then select Paste. When prompted, choose to replace your current data.

Hello,

I imported my email accounts from Thunderbird for desktops into Thunderbird for Android. Everything works as expected with my own mail servers, i.e., I can send and receive emails. However, when I try to send an email to t-online.de, Thunderbird refuses to do so. The email remains in the outbox indefinitely, and then I receive an error message stating that the maximum number of retries has been reached. However, I do not receive an error message. The email simply remains in the outbox. I deleted the account and added it again, but the behavior remains the same.

What's strange is that it works without any problems with K9 Mail. Both sending and receiving emails works fine here. What could be the reason for this?

I am using the stable releases of Thunderbird 14.0 and K9 Mail 14.0.

On a 15" tablet, it would be nice to see the imap folders permanently, so i could drag emails to them. Im a librarian and i like to have a nice structured subject ordered inbox. But i cant find any ways to fix the folders list to the left side..

Hi,

Every time the phone was sleeping, i need to restart TB, or it will not refresh imap folders (3 accounts active, one icloud).

Once it gets restarted, everything is working as expected.

What to do?

Best regards,

Andy

Hi. The "What's New?" page displayed all this: __________________________________________________ Help us improve your firefox.com experience

In addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy. Cookie settings Firefox home

   Features

Top Features

   Fingerprint Blocking
   Ad Tracker Blocking
   Private Browsing Mode
   Free Password Manager

View all Firefox Features

Resources

   Product
       Desktop
       Mobile
       Release Notes
       Support
       Add-ons
   Learn
       Blog
       Compare
       Podcast

Download

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR Firefox Privacy Notice Download

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR Firefox Privacy Notice Release Notes

   Desktop Desktop Beta & Developer Edition Desktop Nightly Android iOS 

See what’s new in Firefox!

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release. 143.0.1 Firefox Release

September 19, 2025 Version 143.0.1, first offered to Release channel users on September 19, 2025 Fixed

   Fixed a tab crash experienced by some users caused by DLL injection. (Bug 1872261)

   Reference link to 143.0 release notes.

Get the most recent version

Download Firefox — English (US)

   Windows 64-bit
   Windows 64-bit MSI
   Windows ARM64/AArch64
   Windows 32-bit
   Windows 32-bit MSI
   macOS
   Linux 64-bit
   Linux ARM64/AArch64
   Linux 32-bit
   Android
   iOS

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Download Firefox — English (US)

   Windows 64-bit
   Windows 64-bit MSI
   Windows ARM64/AArch64
   Windows 32-bit
   Windows 32-bit MSI
   macOS
   Linux 64-bit
   Linux ARM64/AArch64
   Linux 32-bit
   Android
   iOS

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR

   Download Firefox
   Download Firefox
   Download Firefox
   Download Firefox
   Download Firefox
   Download Firefox
   Download for Linux 64-bit
   Download Firefox
   Download for Linux 32-bit
   Firefox for Android
   Firefox for iOS

Firefox Privacy Notice All Firefox downloads Need help or want to leave feedback? File a bug Leave feedback Get Involved

Did you know that most of the content in Firefox Support was written by volunteers? Find out more Other Resources Developer Information Complete list of changes for this release Press Kit Mozilla and Firefox News Firefox Extended Support Release All Firefox for Desktop Releases Learn more about Firefox Get the most out of Firefox with how-tos and online security tips.

Get Firefox news Download Download Firefox

   Windows
   Mac
   iOS
   Android
   Linux
   Custom Download Options

Latest Builds

   Nightly
   Beta

Firefox for Business

   Enterprise

Community

   Connect
   Contribute
   Developer

Resources

   Compare
   Release Notes
   Learn
   Support
   Add-ons
   Community
   Blog

Follow Us

   Instagram
   YouTube
   TikTok
   Bluesky
   Podcast

Firefox

   Website Privacy Notice
   Terms of Use
   Cookie Policy
   Community Participation Guidelines
   Logo Trademark Licensing

Powered by Mozilla

Putting people before profits since 1998 ___________________________________________________ Wierd. Thanks. Greg

You sent me an email that says I have successfully created a password on "Windows 10" "I have Windows 11" ?? I need tech support because I don't know how to log into my account. Can I get a call at [edited phone# from public community support forum]. Name Paul Yoshida.

How to make Firefox my default browser on my new computer a Windows 11 computer. I’m to the point where I’ve got a pop-up window, which says sync Firefox on your phone or tablet. I am asked toOpen Firefox on my mobile device. Then Go to the menu and tap sign in. That’s where I am. Now I’m asked to tap “ready to scan” and hold my phone over the code. Unfortunately, my Firefox app does not show a ready to scan option after I get to sign in. Help!!

Hi,

On some websites (e.g. archlinux.org) most numbers are not rendered. See attached screenshots showing the same page on Firefox and on Konqueror.

In my font settings, I do allow pages to change fonts. Some pages (e.g. this one) do change the fonts and appear well. However, if I disable the feature, then they also break.

I'm using: firefox 145.0.2 (64-bit) archlinux plasma-desktop 6.5.3 wayland 1.24.0

Any idea?

I somehow changed the actual email screen (where the message to send is) and have lost the "Send" button. How do I restore it? I tried to attach a screen shot and was unable to.