All Products Community Forum

Today when I logged onto my MacBook I found that my Thunderbird desktop application is corrupt. When I attempt to open it states "You can’t open the application “Thunderbird” because it may be damaged or incomplete." Screen shots included.

I last used TB with no issues on Oct 27th.

I have over 20 years of TB emails that I do not want to loose.

I have backed up my profiles folders (there are 3) from >Go>Library>Thunderbird>Profiles

My first question is that I thought there were multiple locations of profiles. One for local. But I can only find the above profile.

My second question is how to I go about re-installing? Should I remove the corrupt application first and and then reinstall? What steps should I take?

Thank you!

I am a very long term Thunderbird user with gigabytes of historical emails w/attachments currently running esr 115 on my primary Windows 11 (upgraded from Windows 7 to Windows 10 to Windows 11) workstation. I need to migrate to a newer host which also runs Windows 11, so I installed release 144 over the weekend to get prepared for the migration. I know that the basic rule is that the From and To Thunderbird apps must be running the same version, but out of an abundance of caution, I would like to do that at the version of the production system which is on ESR at version 128.5.2. The download page is only offering a 140.something on the esr channel. Is there anyway to get 128.5.2 to accomplish the migration?

this week I changed my Google Password and using Google, I can not access my Mozilla any longer to download it. It will download but when I want to finish it comes up with a screen as if Mozilla is broken. It lies within my Google new password I am sure, but I dont know how to fix it.

I went into Thunderbird on my new PC, donated a few rand and went to "Install Thunderbird on Windows" - I get a Red circle with a red line through the middle with a comment "This content is blocked. Contact the site owner to fix this issue" What do I do now? Please help?

Mozilla has announced that:

> Beginning with Firefox 144, the minimum supported Android version will increase to 8.0 (Oreo)

Where can we download version 143 to install on older devices (Android 5 to 7) from now on?

Summary of Mozilla Support Page Selection

The selected text provides a collection of links and statements grouped under several categories related to Mozilla and Firefox.

Mozilla Information & Legal

   Mozilla: Links to the main mozilla.org site, contact information, and statements regarding:

       Trademark Abuse reporting.

       Source code availability.

       Copyright: Portions are c◯1998–2025 by individual mozilla.org contributors.

       Content License: Content is available under a Creative Commons license.

       Parent Entity: Link to the Mozilla Foundation (Mozilla Corporation’s not-for-profit parent).

   Terms & Privacy: Links for:

       Terms of Service

       Privacy

       Cookies

Firefox Products & Downloads

   Download: Direct links for various Firefox versions:

       Desktop

       Android Browser

       iOS Browser

       Focus Browser

   Developer & Pre-Release Versions:

       Firefox for Developers

       Developer Edition

       Beta

       Beta for Android

       Nightly

       Nightly for Android

Community & Support

   Community: Links to:

       Join our Community

       Explore Help Articles

   Help & Language:

       Get Help

       Language (Repeated entry)

Mozilla Account

   Sign In/Up

   What Is It?

   Reset Password

   Sync Your Data

Social Media

   Twitter (Mozilla)

   Twitter (@firefox)

   YouTube (firefoxchannel)

   Instagram (firefox)

Madam/Sir

Please let me know if Firefox VPN is now made available for installation for Indian subscribers.

I am aware that Firefox may not have a server in India,as per our laws.

            Thanking You,

               Viraj

I've noticed that I've got both the 32 bit (../Program Files (86)/..) and 64 bit versions (../Program Files/..) of Firefox installed on my pc. I didn't install both and both appear to be the current version. Is this normal behaviour? Only one instance appears in add/remove programs, but if I go to default apps, Firefox appears twice (presumably the 32 & 64 bit versions). If this is not normal, does anyone have a suggestion as to how to remove the 32 bit version without damaging the 64 bit one?

I am professional developer and deliver Android rugged devices to professionals. I do not want to log on my personal Google account just to install Firefox via Google play. I am used to install via adb commands the apk packages. Why cannot we find the apk of Firefox easily to download ? thanks

hi,

  I have an old PC with this CPU:

Architecture: i686

 CPU op-mode(s):         32-bit
 Address sizes:          34 bits physical, 32 bits virtual
 Byte Order:             Little Endian

CPU(s): 1

 On-line CPU(s) list:    0

Vendor ID: AuthenticAMD

 BIOS Vendor ID:         AMD                                             
 Model name:             AMD Sempron(tm) 2400+
   BIOS Model name:      AMD Sempron(tm) 2400+                             CPU @ 1.6GHz
   BIOS CPU family:      29
   CPU family:           6
   Model:                8
   Thread(s) per core:   1
   Core(s) per socket:   1
   Socket(s):            1
   Stepping:             1
   BogoMIPS:             3333.66
   Flags:                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat p
                         se36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow cpuid 3dnowprefe
                         tch vmmcall

Caches (sum of all):

 L1d:                    64 KiB (1 instance)
 L1i:                    64 KiB (1 instance)
 L2:                     256 KiB (1 instance)

Vulnerabilities:

 Gather data sampling:   Not affected
 Itlb multihit:          Not affected
 L1tf:                   Not affected
 Mds:                    Not affected
 Meltdown:               Not affected
 Mmio stale data:        Not affected
 Reg file data sampling: Not affected
 Retbleed:               Not affected
 Spec rstack overflow:   Not affected
 Spec store bypass:      Vulnerable
 Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitizatio
                         n
 Spectre v2:             Mitigation; Retpolines; STIBP disabled; RSB filling; PBRSB-eIBRS No
                         t affected; BHI Not affected
 Srbds:                  Not affected
 Tsx async abort:        Not affected

in some linux (arch 32 bit) I have problem executing firefox, Is there a version for CPU without request from SSE3 Flag?

thanks

Yesterday I set up my Laptop with a new Windows 11 system from scratch. Then I installed Thunderbird from the Microsoft store and tried to paste the copied repository to the Profile Folder in %APPDATA%/Thunderbird/Profiles (as described here). And was astonished - there was none. All the folders as described in the Thunderbird settings (e.g. Local Folder, Profile Folder etc) are still descibed within Thunderbird to be there - but werent. When I clicked on "Open Folder" in the "Troubleshooting Information" - Page - I got an error, that it is not there).

I had to delete Thunderbird and learned by that, it iis installed as an App - it cannot be removed as programs are removed.

So I am left with the question: How to migrate the repository of Thunderbird is installed as App from the Microsoft Store? Where are the data persisted?

Am setting up wife's new computer. Windows 11 (not S mode). Made several attempts to download T-bird desktop but got no file. Even made a donation and still got no file. Tried to get the download on my Win 11 computer and got no file. I saw here that others with this problem were told to look for a small download box in the upper right corner of the screen and one responder provided a graphic. I looked but did not see the box.

I have downoloaed Firefox offline installer (a .xz file) from here:

https://download-installer.cdn.mozilla.net/pub/firefox/releases/139.0b9/linux-x86_64/en-GB/

I have also downloaded a .asc file, presumably a pgp signature.

Now both files are saved locally in my computer.

Assuming Linux latest release, how do I verify the contents of the offline installer file (.xz) from the Linux Terminal? I have install gpg tools. And commands like ```gpg``` are available.

What I did so far:

 gpg --show-keys --with-fingerprint firefox-139.0b9.tar.xz.asc

with this output:

 gpg: no valid OpenPGP data found.

Do you really want us to verify the contents of the installers you provide? A sha256 sum would be great, though not as secure, for when the GPG predictably fails for the ordinary user due to its huge and useless complexity and bureaucracy.