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I have been struggling with slowness in Thunderbird in recent months (Windows 11, mid-range Lenovo laptop). There is often a distinct lag during even the smallest operations.

Examples are: selecting an email, closing a tab, typing, calendar events editing.

TB process in Windows usually uses 1000MB RAM. RAM is around 60-70% usage usually. I never have the same slowness issues with other applications.

I tried quite a bit: safe mode testing, removing extensions, compacting folders and more tips. I ended up removing Thunderbird and my profile entirely, and reinstalled the latest version with an empty profile. I just set up my Gmail and other email account. No extensions installed, yet still the same issue.

Could it be that something is still there from a previous install, if I removed my profile?

I've been using Thunderbird in Linux and Windows for years with moderate issues that I was able to resolve, but am now really puzzled. Please help.

Hello, All

I need major help, please.

I am getting the attached messages when trying to send an email. Thunderbird worked perfectly yesterday morning, but then would not send any emails. I get emails, but cannot send from my 2 accounts.

I am on the latest version of Thunderbird, Supernova 115.10.1

Also, I cannot find out where to change my password for the accounts, because at times I need to fill in a password. I can't find it.

Thanks in advance for any help.

Best, Leslie

Hi, i just got a new laptop (Asus Zephryus G16, 2560 x 1600 screen) and after installing Firefox there is a thin white border to the left of the screen when running in fit screen. This problem is not present when in a windowed mode or in F11 full screen.

I tried updating the Intel Arc drivers but this did not fix the problem. Changing to compatibility mode also did not fix te problem.

PS: in the uploaded screenshots it is quite dificult to see the white line(because the background is also white), but when the image is viewed in a new tab it is visible.

Thanks

I am using Firefox v125.0.2. When I open a PDF in Firefox it takes a lot of time to load. But, when the same PDF opened in the Edge browser it loads normally and scrolling through PDF pages renders fast. I have shared the screenshot of a single-page pdf loading taking quite a long time.

Could someone please help me with this.

I've been a Firefox fan for years. I thought I'd try Thunderbird. I'm in need of some help please as I'm going round in circles.

I am trying to link my btinternet email account to Thunderbird. Thunderbird cannot do it automatically so I have to enter the details manually.

I have all the right settings according to BT: Incoming POP 995, SSL enabled but not StartTLS. Outgoing Port 465, SSL enabled not StartTLS. mail.btinternet.com is used.

The User Name and Password are correct but Thunderbird cannot connect to the account. There are no Firewall issues.

Something is happening because BT have notified me of potential unauthorised access and I have to reset my BT password. Even when I enter the new BT Password Thunderbird cannot link to the account.

Any suggestions as to what might be causing the problem? Thanks.

Since last update, Reminders pop up window will not close as before when the reminders are all cleared. Have too manually close the window. Saw this was an issue many versions ago that seemed to be cleared after an update. I could find no way to "fix" the issue. Is this a new bug?

Hi

I am running Thunderbird on WIndows 10. I have eight different email accounts, but only one profile.

This morning on startup, all accounts and folders were gone and the "open your account" tab was open.

After several hours of frantic searching on the net, I took the most recent profile "prefs-9" and used it to overwrite "prefs.js" This brought back all my local folders and saved emails.

However, the email accounts used to be Wotsit@gmail followed by Inbox, Sent, Draft etc. Now the first account name has been moved, leaving behind its old Inbox, Sent etc with the correct email count but nothing at all in the right hand pane. The account header has re-appeared amongst other account headers but with nothing in the Inbox, Sent etc.

What I need to do is make all the emails visible in the "headerless" section, and return the correct header above them.

Here is what it sort of looks like -

Inbox (3) 2100 Sent 998 Drafts

Then further down after other accounts - Wotsit@gmail.com Inbox Sent Drafts

How can I move the Wotsit header back to where it should be?

I really appreciate the help you folks offer, and the time you put in helping us mere mortals!

I've been having problems with some websites not displaying content, others displaying error messages. So have been going through the Troubleshooting Mode and diagnostic process.

The cause is the MS CoPilot extension for Firefox.

Useful in other ways as I discovered several other extensions I don't need, hence have remained disabled.

Firefox is working in background and draining the battery. That what I see in battery usage information. I have tried to limit and stopped Firefox but it is still on the top of battery usage.

Bonjour, Je n'arrive pas à me connecter à l'application Thunderbird. Lorsque je saisis mon mot de passe qui est correct, apparaît le message suivant : Échec de la connexion depuis le serveur imap.orange.fr avec le nom d'utilisateur alain.schneider30@orange.fr Cordialement Alain Schneider

I get this Error message when I try to send emails from my outlook email address in Thunderbird. Basically asking me to enter a Password to login to office365 server ! My Password is correct, and has not been changed recently.

Any ideas please ?

Hi 😊 I’m trying to resolve my sisters’ issue with Thunderbird, and I know nothing about Thunderbird. When I open Thunderbird, I have an issue in that the Archive folder is there but no content is shown

Yet if I go to where the files are they seem to be there. They were working but I accidentally deleted the folder and out of the trash folder as well. If I go into “C:\Users\Sue\AppData\Roaming\Thunderbird\Archives.sbd” where the emails and folders are, they seem to be there but not showing in Thunderbird when I click on any folder in Archive and are appear top be very small, i.e. empty.

I have screen shots if you require but thought not appropriate at this stage.

I always want the address bar suggestions to start with my bookmarks. Is there a way to control the results? I remember there was something in about:config previously.

I want to change the reminder sound. I already downloaded a MP3 file and I selected it on "Reminders", "Use the following sound file". I can see the window that pops up, but no sound is played. Also when I click on Play, it doesn't work. I know the sound file is fine, thus I can play it on my laptop. What should I do? Another question, is there any Add-on with Reminder sounds?

Thanks in advance.

Running Thunderbird 115.10.1 on Mac OS Catalina 10.15.7. Mail stopped communicating. Tried using the "Access Account Setup" for existing Email. Put in full name, email address and password and clicked continue to have Thunderbird configure the settings automatically. Did not work with auto settings (POP3). Went back to "Access Account Setup" for Existing Email and instead of clicking continue, I selected "Configure manually". Tried putting in the IMAP protocols and correct port settings, but the "Done" button is grayed out. I am at a loss of what to do to get my email back up and running and at the same time don't want to lose and emails/folders that are currently set up. Any help would be great.

Thanks

is there a way to include or insert custom code into the head section of outbound Thunderbird emails?

Note that I am not talking about custom email headers, but custom html into the <head> section of outbound HTML emails.

Thanks!