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Hi, how do I get rid of

"Error: Platform version '143.0.1' is not compatible with minVersion >=141.0 maxVersion <= 141.0 Maybe try to reinstall Thunderbird?"

It's not very practible to do a new copy everytime a Thunderbird Update has to be made because I mainly store my emails in a local copy (respectively a lot of copies already).

could you please help me?

Thx & BR Eva

I'm using version 135.0.1 (64-bit) on Win11. The latest version on the site is 136.0, but no notification is given, and Help/About doesn't do it or offer the option. I've browsed the web page that discusses an "Update Firefox" section in Settings/General, but no such section exists. Anyone knows what happened??? Tnx, Nir

I have a Thunderbird 32 bit version 128 running on Windows 10 Pro. 16 GB memory with 512 GB storage

I first like to know if I upgrade to 64 bit version of Thunderbird. Beside doing a backup of the 32 bit version what be the best way to backup. I planning on using onedrive to backup the data. Any suggestions there is there extension anyone can recommend?

Can I upgrade to 64 bit version without having to do anything?

The second thing please reference the image attached to this thread. As you noticed there a lot of folders in INBOX and in Drafts. I tried moving them but seems they are not relocating. I even tried copying to them to another folder.

Should I try upgrading thunderbird to 32 bit first? There so many folders and subfolders that I don't think thunderbird can handle moving that much data.

The person who setup this application does not have any computer background at all.

I appreciate anyone who can assist with this issue.

hello the flatpak update command tells me that the runtime is eol and its used by the flatpak thunderbird. can you please update the runtime soon? i add a screenshot of the issue, its in german. please review this as fast as you can please greetings oski

Greetings.

I am using an old Linux Mint version. I got messages that my Firefox needed to be updated.

I finally figured out how to do that and updated it. I started to use it. No problems.

However, the update did not change the default Firefox in the menu or on the taskbar panel below. If I click on them, I get the old version.

So when I restarted the computer, when I clicked on the Firefox shortcut icon in the lower taskbar I got the old version with the tabs that were on it. I had to go back into the Firefox file downloaded for the update in order to open the new version.

So, how do I get a working shortcut icon for the new version and get rid of the old version/icon?

Thanks.

David

I want to install latest version of Firefox due to come into effect on 14th January but my Mac OS X won't allow it to happen probably because it is out of date and unsupported I would be grateul for help on this please ( I have reached the limit of OS X on my current desktop) Charles

I'm stuck using MacOS 10.14 right now, so I can't use anything newer. I know everything listed here is an old, unsupported release with its own security concerns. Let's get that out of the way. OK, good...

Right now, I'm on TB 102.15.1, and I'm wondering about TB 115. If I go to the About box, it's prompting me to update to 115.10.1.

If I read the release notes for 115.10.1, it says, rather worryingly:

Known Issues unresolved

After changing password on an IMAP account, the account could become locked due to too many failed login attempts.

Does anyone know if this particular bug was fixed via later releases in the 115esr series?

I'd rather not leave TB 102 if the above bug is still a concern.

Thanks!

I have noticed that Firefox has been getting too many updates recently...even as much as 2 updates this week alone. Frankly i'm sick of getting the green icons and pop-ups in the upper right corner. Is there a way in about:blank codes to turn off these stealth downloading behaviour and prompt pop-ups to restart the browser and let me just manually do it in settings when i want to but without notifications ?

Why hasn't Firefox updated since April 15? (It's currently the 28th). Things are lagging, primarily on You Tube (for the last 4 or more days), and normally updates don't leave as much time in between updates. Anyone know what's going on? Will it ever update or do I need to leave for another browser?

Using Firefox without Internet in closed environment.

Could you please disable Update Check with fake notification "Update Available - download now"?

Thank you!

chasjones

Jul 15, 2025, 07:02 CST

Yesterday morning, my Thunderbird app. was automatically updated..... since this occurred, I have not been able to compose a "New Message" after clicking on the "+ New Message" button. What should I do to regain the ability to compose "New Message"?

I'm on the Release channel, but was updated to 142.0 Beta. Surely this is wrong. I am not on the Beta channel. I just want to stay updated to the most recent stable release.

Thunderbird version 142 seems to have affected OWL. One of my email accounts that is on a microsoft server has completely disappeared. Please help. Am I able to go backwards to a prior version.