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This has just started to happen today. Each message I receive has the Message ID in the message pane header box underneath the date. Please explain why this is and can I stop this happening?

There is no immediate delete "trash can" in the message card view. Why?

Many messages can be deleted as you view them in the card. Additional steps, such as highlight-delete or clicking the dots and then deleting, are extra steps that are not only inefficient but also extremely annoying.

Can this be fixed, or is there a step I have missed to add a trash can to the card display?

Every time I want to print an email, the default copy number on my printer menu is shown as 2.

I don't know how, when or why this change [from 1 copy to 2 copies] happened.

I wish to 'reset' the default copy number to 1, so I don't accidentally print a second copy and waste ink, etc.

When I want to print documents stored on my PC, the copy number field on the printer menu is blank, allowing me to enter the number of copies I want - so the issue appears to occur only when I print emails.

I have been reading the posts re this problem; there have been quite a few. Ever since I updated to Win11 (a week ago) and installed the latest version of Thunderbird, I have not had any option to allow external content in my emails. There used to be a yellow bar above the email body with an "options" button. There isn't now. I have tried checking "allow eternal content in messages" in the settings; no change.

There was a suggestion to work around this by pointing at the message and choosing "unencrypt email and copy to...(choose folder)" from the popup menu, and then read the unencrypted message in that folder. The menu I got only had "copy email link" and left me to decide what to do with it. A newsletter in HTML is very hard to read. I don't want to work that hard.

Others with this problem were using Bitdefender, and you seem to have concluded that this was a problem with Bitdefender and doesn't need any further help from Thunderbird. I do not use Bitdefender. I hope you will change your minds and address the problem. I liked Thunderbird before, and now it's turgid and hard to use. Should I downgrade to an older version? If so, please tell me how.

Some time back I learned that going to config and changing "mail.delete" from FALSE to TRUE would change the way deletion worked so that after deleting a message the cursor would move to the next most recent message instead of the subsequent one. I've now decided that indeed I preferred the default setting of FALSE. I have changed it back on my two PCs, both running Win11 24H2 and TBird 128.14. On one PC the direction was changed back to the default direction, i.e. go to the subsequent message. On the other one it still moves to the prior message. I think I have done exactly the same thing on both PCs. What do you think I might be doing wrong?

I'm using a Windows 11 laptop with a 14" laptop with a 1920 x 1200 resolution. I'm using Thunderbird to access 5 email accounts, calendars and cardBook. I'm looking for suggestions and tips about the best layout to maximise the display of my email information with the minimum of scrolling.

Thank you.

Until today Oct 14, 2025 I could edit the subject line on my incoming e-mails by right clicking the subject line and use 'edit subject'. As of this morning that option is not available in the context menu that comes up when I right click the subject line for an e-mail in my inbox. anybody have any ideas? I use this function constantly in my business to add the customer name to the subject line for customer searches and if I send a copy to a vendor so all messages pertaining to that customer are easily found.

I can't find where to edit the rules that I previously created for what will happen when a certain mail comes to my mailbox. I set up a rule that marks a mail from a certain sender with "Important" and also sends a copy to another mail adress but now I can't edit the rule. Can someone help me with where I can find the rules and edit them?

I have been using Firefox since I first started using computers, so for over fifteen years. Initially, I only used it on my PC, but for the past few years I have also been using it on my iPhone and iPad. Until now, I have been a very satisfied user, but for some time now I have been extremely dissatisfied with Mozilla and Firefox. I have been using Startpage as my search engine for many years and Firefox is set up that way on all my devices. But on Apple devices, every time I open the browser, Google is now set as the search engine again and I have to correct the setting every time. I find this patronising, inconsiderate and extremely rude. If this cannot be changed very quickly, Firefox will no longer be my default browser on any device. I would be very sorry to see that happen, but it really is not acceptable. Are you so short of money that you have to rip off your long-standing users? I would be very grateful for a reasonable and helpful response.

Others have mentioned this but I'm not sure if there is a fix/anything is being done. The threads are all from previous Thunderbird versions.

I use Thunderbird for work. I have to find specific emails and folders - get to them quick. I am no longer able to do this. It's really distressing.

This is something really basic, that should be the default or else really easy to change.

I'm on a Windows machine and using Thunderbird 140.3.0esr. I've been using Thunderbird since 2003 and never had any problems. Now I'm panicking!

I have 1 computer that shows bars at the top and left side that I like. The one at the top shows Get messages, Delete, Reply, Reply All, and a few more items. The one on the left side shows icons that are for Mail, Address Book, Calendar, Tasks, and Chat. I have another computer that doesn't have those bars. I have attached a screen shot from that computer. Both are running T'bird 140.4.0esr (64-bit) and both are Win 11 machines. I've tried everything I can see to get the 2 bars to appear on the 2nd computer. I hope someone can tell me how to get them to show up. Thanks, Mike

I want nothing to do with AI.

I have unticked perplexity.ai in preferences#search but every search from the search bar and address bar goes to perplexity.ai then immediately crashes and displays "Internal Error".

To use DDG I have to type duckduckgo.com on the address bar then search from there.

Firefox 140.4.0 ESR.

I've' scanned the PC with malwarebytes. I restored windows from a backup image I haven't made any changes to the PC at all. Was working fine in the AM but by later afternoon, it started using perplexity.ai exclusively.

How do I get rid of perplexity.ai

I use Thunderbird for my emails on a Windows-Desktop. I still run Windows 10 as the computer is too old to upgrade to Windows 11 and I have signed up for the extended Maintenance.

In Thunderbird I have set up filters to organize my mail. When I wanted to change one of my filters a few days ago, I was not able to do so, as my Menu in Thunderbird doesn't show the ->Extra Option any longer. My Thunderbird-Version is up to date (140.4.0esr (32-Bit))

Any idea, how I can access my filters and maintain them again?

Thanks for your thoughts and your support

I recently transferred my Thunderbird email to a new Windows 11 laptop. Everything is ok, except the font size in received emails can best be described as very tiny. I've tried everything to increase the font size, but nothing helps. My screen has a resolution of 2880x 1880 Any help would be much appreciated. Thanks.

I'm trying to stop Firefox from restoring tabs after I restart my OS. So far, I've done the following:

• Disabled `Startup > Open Previous Windows and Tabs`
• Disabled all extensions
• Confirmed I do not have a `user.js` file
• Set `browser.sessionstore.resume_from_crash` to `false`
• Set `browser.sessionstore.restore_on_demand` to `false`
• Set `browser.sessionstore.resuming_after_os_restart` to `false` (It was already set this way.)
• Set `browser.sessionstore.max_resumed_crashes` to `0`
• Set `privacy.clearOnShutdown.openWindows` to `true`
• Set `browser.sessionstore.max_tabs_undo` to `0`
• Set `browser.sessionstore.max_windows_undo` to `0`

(I've since reverted the last two and the extension changes after they didn't work.)

So far, Firefox will not restore tabs on application restart (manually closing and relaunching) or on crashing (after sending SIGTERM/SIGKILL), but it still restores tabs after restarting the OS (if I allow the OS to kill it during shutdown). I've seen a couple suggestions to disable history completely, but I do occasionally refer to my browsing history, so I'd prefer a less-drastic approach. Ideally, I just want Firefox to treat the first launch after a shutdown as a normal launch and not apply any special behavior. Any help would be much appreciated!

System: Fedora 42 (Workstation Edition) Running Firefox 144.0.2 on Gnome 48.6-1.fc42