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Hello, I'm an avid user and supporter of Mozilla Firefox. But I installed AVAST as an additional protection tool...and I have just subscribed today to Avast Antitrack to avoid being tracked and hacked. But, to enable AntiTrack, I'm now prompted to add it to Firefox !? Before any action, I'd like to know that this will be efficient and safe : can you confirm that this is compatible with Firefox's proper operation? Thank you, P.Huens.

The Mozilla Sent Folder is not in the list any more. I just noticed this a while ago and tried to find where it is and I cannot see where it has gone. I did not remove it. Thanks for your help and efforts.

Example:

I have created a sub folder for my bank (Banking) all mail goes there that is from the banks domain.

After that there is secondary sub folder for card usage receipts, transaction reports; my bank sends me one every time I use my card so I get a ton of these which I don't want to clog up the important mail from the bank, statements, transfers, etc.

I have tried creating a rule for the transaction receipts by subject but this conflicts with the primary rule of the banking folder because they use the domain address. The mail just bounces between the two folders.

How do I create filter a to run on solely on the Banking sub folder to redirect the transaction junk to it's own folder?

I want to change all the tab bars to hide thread column but i cant do it because toolkit.legacyUserProfileCustomizations.stylesheets doesnt look for css file any more. That's a pita, i have a lot of folders I there another way of changing this and other things globally?

Hello guys,

I've been a passionate user of (and advocate for) Thunderbird for more than 20 years now and was quite delighted when Thunderbird for Mobile was launched. At last I could use Thunderbird on my phone and tablet as well as my desktop! I've used Bluemail (the best of the rest in my view) on my mobile for some time and am currently comparing its performance side by side with Thunderbird for Mobile, having just installed the latter. In terms of fetching message I'm actually finding Bluemail much speedier at the moment and don't know why this is so. For example, I can often read incoming emails on Bluemail five minutes or more before they arrive via Thunderbird. So far as I know, I think I've tweaked all the necessary settings on Thunderbird but may be overlooking something. Can anybody suggest a way to speed up Thunderbird? I'm more than keen to keep on using it.

Cheers,

Grant

On my website, fast scrolling causes major stutter when a sticky header with backdrop-filter overlaps a long list of lazy-loaded images. Steps: Open website → scroll quickly several screens Expected: Smooth 60fps; Actual: drops to ~5–10fps + “page slowing down” warning Notes: Removing backdrop-filter fixes; setting images to eager helps Env: Windows 11, Firefox 130 (64‑bit); Chrome/Edge are smooth Any known bug IDs or CSS workarounds (e.g., force own layer, reduce blur radius)?

Ich habe als Browser 1und1. Dort im Webmailer sind auch meine email-Konten. Auf Thunderbird habe ich versehentlich ein email-Konto gelöscht. Beim Webmailer aber noch vorhanden. Wie kann ich das email-Konto wieder bei Thunderbird herstellen. Mit der Option neues Konto erstellen, funktioniert dies nicht

I'm running Thunderbird 140.1.0esr 64-bit on Windows 11, all up to date. I've tried several times to add a new account to receive email to the webmaster for my website. The email address is set up with my web host. I want to add the account so that I can test but the process hangs.

From the main page I choose Tools > Account Settings > New Account > Mail Account then provide the required full name and email address then click Continue. I get what appears to be a screen indicating that processing is taking place (the rotating circle) but it never concludes.

I used Webmaster as the user name and webmaster@mydomainname.com.

Can anyone suggest what I might do to fix this?

Hi,

I'm trying to add another account to my Thunderbird client (already have 2, a IMAP account, and a Hotmail/Live/Outlook), but i keep getting the error "Exchange auth error" and no possible way to manually configure the server or anything, despite the mail server not being an exchange server. Following this, it just freezes the view, although i can close the popup by pressing escape.

is this a bug in the most current version of Thunderbird, or am i doing something wrong?

I recently installed Thunderbird on a tablet running W11. I have 5 email accounts with a common domain name. I want to install two of them on the tablet. The first one went smooth. I can't get to a window to install the second one. I get a window which asks for my name and email account but no place to put password. If I push "Next" button, I get a spinning wheel which goes on forever and does nothing. Any suggestions would be appreciated.

I am using Thunderbird 140.0.1 (64-bit) for Windows and with this update there is a new account windows sety up. When adding a new account it only asks me for the email address and when I press continue it I get a blue circle going round and round and no progress. In previous versions I would input the email and password and this would work.

I’m using the Windows 11 version of the Thunderbird app, but when I try to add my Outlook account and enter my password, it shows “Authentication failed. Please check your username and password,” and I can’t complete the Outlook setup. I’ve tried changing my Microsoft account password and entering an app password, but neither worked.

Hi. I ve been trying the hole day to add my IONOS email account "r.uhlhorn@starvan.eu" to my thunderbird. It doesnt work. See pictures attached, thunderbird does not ask me for any password, only name and email adress. Then it gets stuck completely. Please help.

Best regards, Ralf

When I try to add my Outlook account, the authentication process requires a password input rather than redirecting to Microsoft’s OAuth2 login flow. My Outlook account is configured as passwordless, meaning I typically sign in via Microsoft Authenticator, biometrics, or a security key. I have already tried deleting and recreating my Thunderbird profile, but the issue persists. Since this is my first time adding this Outlook account, there is no existing outgoing server (SMTP) entry for Outlook in Thunderbird’s list. I attempted to manually configure the SMTP server (smtp.office365.com, port 587, oauth2), but the same password prompt appears, and I cannot proceed.