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Since the UI upgrade, my Thunderbird client has become slow on my PC. On opening instead of what was previously a quick start-up to my INBOX, it now hangs and you can see (from bottom left) its polling out to email servers and waiting for a response .... much slower than previously.

It's not a server response as I use same email on my iPad and that logs in with almost zero delay.

Occasionally also lags behind key board, you are typing and you are several characters or even words in front of the client.

Is there any rebuild or similar I should do now I am on the 'new look'

It appears that Thunderbird Supernova version 115.3.3 (Windows 11) has a bug or compatibility issue with large profile file and/or Storage Management - Intel Optane Memory.

Since I installed that new version, Thunderbird has been slow and stops running frequently.

I would reinstall Thunderbird to see if that fixed the problem. However, I am afraid of loosing data.

The installation has 3 email accounts and two of them are not allowing a logon and one is missing its control block.

Latest Thunderbird update 115.5.2 on my Windows 11 laptop has completely slowed the computer down and keeps opening the 'Help Keep Thunderbird Alive' webpage when I launch Firefox.

Since installing Supernova, I find a huge (multiple minute) delay whenever I open a folder to a new tab or window. There was zero delay on the prior version to open a folder, so it appears to be specific to Supernova. I'm surprised that no one else has mentioned it on the forums yet, so it seems it might just be something about my particular setup. Can anyone help me diagnose what I might be doing wrong?

Thanks!

After latest update to Thunderbird (115.4.1 (64-bit)), it's unacceptably slow. My mother also has new laptop and it's the same. Will need to migrate to Outlook if it's not fixed soon. Any help?

Since updating to Thunderbird Supernova is becomes unresponsive at some point when left in the back ground and working in another app. This might happen within 30mins or after a few hours.

This has been happening consistently for the few days it's been updated.

I have tried opening it in safe mode with the add-ons disabled, but the same thing happens.

Not sure where to go to from here, any help or suggestions most appreciated  ?

The only other issue I've noticed is that calendar notifications won't dismiss but will close. However they keep popping up after the event has passed and will do so unless I delete the event.

On latest version 115.3.1 (64 bit) when I click on GET MESSAGES nothing seems to happen for several minutes than after repeated clicks on same suddenly line at bottom shows downloading some number of messages. Is this something I am doing to slow what used to be very speedy process to download messages from Comcast server to my PC?

When I opened Tbird app today, my messages show in various folders but only a list of messages, not a screen to view contents of message being examined. I did not do anything I am aware of to change this and haven't been able to locate setting to turn on the message content view again. Also on list of messages, they are shown but with a much wider spacing (double space?) with lot of wasted blank space. How to correct this?

Dear Thunderbird Community,

I am a die hard fan of the Thunderbird Mail Client, particularly on Ubuntu-based operating systems and have been a loyal user for years. However, with each new "upgrade" or "improvement", it seems to me there is always that lurking problem of HANGING SLOWNESS.

Why do I frequently get these warning signs of "BUSY" or "FORCE QUIT" "WAIT", on a routine basis. Yes, my HP Spectre x360 laptop is from 2016, and it's aging a bit; but I only have the Firefox Developer Edition browser open at the same time as my Thunderbird Client.

It's not like I'm using all of the systems resources. So, why the frequency of hanging slowness? It's very frustrating when you're inspired by an email message that you're quickly typing down and your thought process is rudely interrupted, because you're waiting for the Thunderbird Mail Client app to return to normal?

Is there something inherently going on in the background is that is slowing down this app's performance? It's a very bizarre problems that really affects your daily productivity and communication goals.

Please shed insight or provide tips and/or advice.

Thanks!