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I am trying to set up a visualization of the columns of the main interface. Here's what I do:

1. Click on the list icon in the top right corner.
2. Uncheck the columns I want to hide. Specifically, From (CB), Recipient (CB), and Correspondents (CB).
3. Apply the selection to all folders: click on the icon in the top right corner, apply columns to.. > folders and its children... > select account > Confirm

These actions produce immediate results. However, the next day or a few days later, when I reopen the program, the column display changes. Sometimes in the main folder (inbox), sometimes in the subfolders.

Is this a known bug? Is there anything I can do to keep the desired column configuration stable?

I keep my mail (both sent and received) in local mail folders. My server is gmail, and sent mail is put in gmail's sent folder by default. Every few months, I copy those messages to a local folder, and after I back them up, I delete the server copy.

What to my dismay, I discovered today that only the message headers, and not the messages were present in the local folder, though they had been when downloaded. Looking at the file sizes, I found the sent file to be 0 Kb, and sent.msf 255 Kb, when sent should have been around 60 Kb long.

I have been able to restore the messages from backup (whew!), but I have no idea how then sent file was wiped out. I know I did not do it.

Has anyone else had this happen? Is there a preventive measure I should take?

I'm on a private home network with an internet connection. When I try to use Firefox it displays a message saying "You must log in to this network before you can access the internet".

Many websites, e.g. Amazon, won't load and an 'Open network login page' button is shown. When I click this it takes me to a Mozilla page talking about Captive Portal, but there's nothing about how to stop this happening and access those websites.

Other browsers, e.g. MS Edge, or Brave, have no problem access these websites.

How do I fix this problem?

i am unable to open a specific profile as i want its always taking me to last profile i used .I tried getting help from AI chat bots and made a short cut for a profile but at the end even its opening the last profile i opened.

I am using Firefox for Android to run YouTube as a Progressive Web App (PWA). As shown in the attached screenshot 1000011880.jpg, there is a persistent red banner at the bottom of the screen displaying "YouTube" and "m.youtube.com". This banner takes up valuable screen real estate, distracts from the content, and ruins the "app-like" experience that PWAs are designed to provide. Request: Is there a setting to disable or auto-hide this bottom security/identity bar? If not, please consider this a formal request/bug report to allow users to hide this UI element once the site identity has been verified, similar to how other mobile browsers handle PWA manifests. I have also attached 1000011881.jpg to show the context of this support request.

I can see where the Local Files are saved under .sdb folders and msf files. I can save these to a USB stick as a backup BUT can I perhaps open on another device also running Thunderbird. Is this possible and how? I can't see an 'open file' in Thunderbird.

In Firefox, to send an email, you click on the NEW EMAIL button in the tool bar and the email app appears. When you click on the TO button to add email addresses, the ADD RECIPIENT page appears and a list of people and their email addresses normally appear.

THERE IS NO LIST OF PEOPLE AND EMAIL ADDRESSES. They have been moved to the PEOPLE folder on the left side tool bar below the top MAIL icon. The email list in the PEOPLE folder is still in tact

My question is how do I correct this error which appears to have happened during an update.

One would think if you highlight the PEOPLE email list it could be moved back to the ADD RECIPIENT list but that does not appear to be possible.

What is the solution????????

Firefox account keeps search history even though only bookmark sync is turned on. I logged out from firefox mobile, deleted firefox mobile, reinstalled firefox mobile, relogged in to firefox mobile and I see again the search history. How can I remove permanently the search history and how can I disable permanently search history saving even though only bookmark sync is turned on?

Hi,

My mail account was recently migrated to office365, and I saw that Thunderbird v145 and later supports this natively without the use of a plugin.

However when I follow the instructions to set this up I don't see the Account hub in the same way that's shown in the article.

https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/

instead I see the one attached.

I've tried this on both Linux (ubuntu 24.04) and Window 11 both with my original profile and a completely blank installation. On Linux I've used both the Canonical supplied Snap (from the monthly/stable channel) and the download directly from thunderbird.net.

Any help appreciated.

I encountered an issue where pasting multiple images causes the upload to fail. It seems like it cannot handle more than 2 pictures at once. Could you please help me fix this?

Had a double disaster, both OS partially upgraded at same time due to space issues and had to wipe and install.

Ended up with a TB install in Ubuntu where 2025 emails are missing. (see image #1) Found out that my backup should have most of them. (see image #2)

How do I safely identify the 2025 mail content in my backup folder, and how do I safely copy them over to the existing set up?

I see that the 933 profile exists in both so most likely it should be one of the lower number profiles in backup I need.

Attached are images of folder content.

Many thanks in advance!