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I have just installed Thunderbird on Windows 11 and it has two very annoying new habits. When I click on an email it opens it instead of giving me a preview. And when I move an email to another folder it also opens that folder. Neither happened on the old computer so how can I get back to the way it used to be?

My Thunderbird calendar refuses to display dates in European format, namely day-month-year. I have read lots of helpful hints on the forums and tried everything, but nothing changes. My system is Ubuntu 25.04 with Cinnamon 6.4.8. Thunderbird version is 140.3.0esr (64-bit). Some of the suggestions refer to settings that are no longer there compared to earlier versions. For example, Settings > General > Language and Fonts has no format options. I have also used the config editor while TB was not running and added ntl.date_time.pattern_override.date_short and ntl.date_time.pattern_override.time_short, without any effect. Dates in the calendar still always appear in the illogical American month-day-year format. This is confusing, to say the least ! Has a solution been found to EASILY select the locale and formats that should be used? At the moment, the settings are under different menus and in different locations, and TB seems to be making it as difficult as possible to get these set - permanently ! - to the user's preference.

Hi,

I just cannot find any information on how Thunderbird designers see the Threads / Threading features to be used. How would I use it ? What are my (individual) choices for configuration ? etc.

The only info I can find is : [how to manage and turn on/off the feature].

...and of course lots unhappy user voices across the forums.

So: How would I use it ? What are my (individual) choices for configuration ? etc. Please link the respective Mozilla resource (blog, help, user design doc, ... whatever).

Ah, to start with, a description of how the feature is meant to behave, can be a start. (Sorry, I was just too stupid to find that)

Hi,

the password manager (about:logins) is a very handy feature, i use all the time. However, tehre is so many pages where the FF password manager fails to suggest the correct login user name to fill in the "user" field. (Interestingly, the password fill is much more accurate).

To start with: for logging in on THIS VERY SITE for posting this question, I needed to:

1. manually open the FF logins page
2. enter the url "accounts.firefox.com" for search
3. pick the entry
4. copy the username
5. swithc back window
6. paste and confirm.
7. repeat for password (I think - or came this at least suggest correctly maybe)

What's going wrong? Is my installation broken - or is this for all users the same experience?

Tks

/home/boris/Свалени/Screenshot 2025-10-10 at 11-57-52 (20 ) Family Farm Facebook.png във играта фемили фарм скрула не работи на нито една картина ,която има лента отстрани се налага да я ползвам. при другите браузъри това не е така. в случай че ползвате преводач това е български език.

Hello, I recently purchased and started using the Hyperx Cloud 3 wired headphones. When I watch a YouTube video or shorts with these headphones, if I skip forward a few times or scroll to watch a new short, a loud popping noise occurs in the headphones. I turn the volume up and down, and it fixes it. Interestingly, this doesn't happen in other browsers, only in Firefox. This is very interesting, and I can't figure out why. I wanted to share this with you because I love Firefox.

NOTE: There's no problem with the headphones; they work perfectly. This is an issue only in Firefox.

When sending an email using the keyboard shortcut, the settings tell me that I can set TB to give me a confirmation prompt. Why can't I get a confirmation prompt when using the Send button? Is there any way to make TB do that?

I set TB to run a spell check before sending, and that gives me an opportunity to cancel the Send operation. But it only works if the email contains a misspelling.

Thank you.

For some reason (accidental key stroke?) one of my email account's folders are no longer arranged alphanumerically. How can I reset the order to alphanumerical? I can't find a menu item or setting to do this. Thanks

Just installed TB for Android on Samsung S24 Fe. Works fine but am unable to exit the application other than forcing phone back to home screen. Have installed on a Samsung tablet and the back button seems to be working OK. Anyone know of any issues with this phone and TB?

Hello, my email service has shut down for the second time. When asked to open, a small window appears and says the system is affected by a whatever. The window only lasts for a couple of seconds.

I tried to follow the instructions as how to get my profile, but is was lost due to an internet access cut.

Hoping someone can help. regards Stephen

Hello,

I've used Thunderbird on Linux for a while and love it! I use it for multiple email accounts from different providers.

Until recently I manually Archived email in to Local Folders on my PC. I do this to remove email from my mail providers and to avoid storage limits.

I recently learned that if I I set the "Message Archives" option to a specific folder for each account under "Local Folders" I can either manually archive there or I can use an Extension like "AutoarchiveReloaded" to do this semi-automatically. Great!

Unfortunately for my main mailbox only, despite being configured to write to a sub-folder under Local Folders, Thunderbird seems to ignore the settings. It always tries to create an Archive folder in the mailbox itself. Every attempt creates a mess which takes time to cleanup.

The mailbox in question:

• Uses IMAP
• Has "Keep message archives in:" set to "Other:" "Local Folders > Archives > (the name of the account)".

I am concerned that if I try "Keep message archives in:" "Archives" Folder on Local Folders it will combine with all my other archived accounts which are sorted in to sub-folders correctly.

Is anyone able to help please?

Thank you!

On our web site (www.outlookmovie.com) we have the option to print documents and we also have a watermarking option

when we do a print and save pdf from firefox > file > print and save a pdf if the option watermarking is off , it works, if the option watermarking is on, it does not work (the pdf exported is zero octet)

could you help us resolving this issue ?

By the way it works when we use Chrome or Safari

Thx you very much for your help Marc Jenny mjenny@mjenny.fr

Hello, Since I updated my iPhones to iOS 26 hell broke loose. On my iPhone 14 ProI can no longer use Firefox as it quits when I open it On my 15 Pro I can use it but most of the time I half only half of the window. I do want you to be my default browser. Can you help, please? How come there is not one article on this? Many thanks! Natalia Great fan of yours

I am buying a new PC. I would like a 'blank' TB on this machine so I can replan the folders and the email address books. I'd like the current copy on my current PC to be moved to the new PC such that I can access it as I do now but- like a 'sleeping' copy - ie just there to access the emails and address book occasionally/when needed, but not receive new emails.

This will give me a fresh start on the new TB on a new PC, and will save me having to clean up the old TB version. Is this possible? Thankyou

I use Thunderbird on Windows and on Mac. I'm wondering why the startup time on Mac is significantly longer on MacOS. I'm currently on Tahoe 26.0.1 but Thunderbird has always been a slow starter. Can I change any setting to remedy this. At the moment I have two mail accounts configured both Gmail.

We've successfully set up a Hotmail account as an IMAP account; all the emails/folders seem to appear properly, though deletions made on Outlook.com don't seem to show up.

But for now, we have this problem: none of the contacts from the Hotmail account appear in the Thunderbird address book.

How can we (1) get those contacts and (2) keep them up to date, preferably automatically.

Thank you.

Greetings! I read everywhere that we must install the Lightning add-on to use the calendar feature in Thunderbird. But when I search for this add-on, I get a bazillion options, none of which appears Lightning. There is something called Lightning Calendar Tabs that keeps coming up. Is this it? Doesn't seem so.

Where can one download/install the Lightning add-on?

Thank you.