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Hello.

I'm wondering if anyone else has similar problems with Thunderbird on Android... Namely, sometimes when I delete messages, the app just stutters or freezes. Today I even deleted some spam messages, and when I refresh, they come back as if I did nothing. The app worked fine for months, but lately I've been having problems. The only solution right now is to delete them on the desktop. But what is the point of the app then? I've cleared the cache, even reinstalled, but these problems keep coming back...

Hello Mozilla Support Team,

I would like assistance optimizing Firefox for better performance, speed, stability, and connectivity.

I want Firefox to provide a smooth and reliable browsing experience, with faster page loading, responsive tab management, efficient memory usage, and fewer interruptions.

Please help me identify the recommended settings, configurations, and troubleshooting steps to improve Firefox's overall performance.

I would also appreciate recommendations for advanced settings that can help Firefox operate efficiently and securely.

Thank you for your assistance.

Recently (last week or 2), whenever I delete an email, the unified inbox shows an empty display, but, if I select the three lines and go to inbox and select it, all the expected emails reappear.

Hello Mozilla Support Team,

I am experiencing some problems with Firefox. Sometimes the browser becomes slow, pages take a long time to load, and videos do not play smoothly. I have tried refreshing pages and restarting the browser, but the problem still happens.

Could you please help me identify the cause of these issues and explain how I can fix them?

Thank you for your time and support.

Part of my problem has to do with the help aricles that direct me to a format that does not exist on myTbird ap ( 159.0)( on my Macbook pro Tahoe 26.7.1. Another problem is that I am constanly being interrupted by sluggishness occurring in last 3 days, probably from memory demands ot Tbird which is insane, I do not have that many emails and have never seen an email program using memory like this. I need accurate guidance to fix this. Help would be so appreciated.

Thunderbird has bricked on me for the 1st time ever. It won't open my inbox. My cursor turns to the hourglass and there's a dialog that says no message found. It seems to know it's me because I still have tabs across the top where I had open messages and also my name appears in the upper right corner. This is on my Dell Windows 11 desktop. I dont know which version of TB I have but I'm sure I have update set to auto. I just now downloaded version 159 but have not clicked install pending what I can find out here...

Hello!

When I opened Thunderbird today, the main middle pane has an advertisement "Welcome to FREEDOM." How do I get rid of this so that I can see and open my email? I have tried several ideas that I found in the comments before I signed in to this support that asked me to sign in. I tried the suggestions, and none of them work, which is why I came here.

I have attached a screenshot of my entire Thunderbird window. I currently. have 298 emails that I cannot access.

I am currently at work, and really need to be able to access my emails.

Also, I have donated in the past, including earlier this year.

Thank you!

ive just downloaded firefox and its giving me performance issues I play gta 5 all day with my chrome tabs open maybe more then 5 sometimes more then 8 and When I had more then 4 or 5 tabs my gta 5 started to lag when i opened my task manager i see that Firefox is using more then my Game.

Hello,

I was composing a message in TB 159.0 when a shower of duplicate messages appeared. Each message in the central pane was present eight or ten times. In my Tools menu I have an option to Remove Duplicates, I think it's an extension I installed years ago but I can't remember clearly. When I ran it a popup appeared telling me no duplicates could be found, which is ridiculous.

I restored my profile from backup and the problem went away.

I would like to know how I can avoid this issue in the future and, if it happens again, how I can eliminate the duplicates,

Alan.

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.

Moderator Notes:

• need a performance profile https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance

To get Thunderbird to display correctly on the screen, you usually need to restart it once or even several times. Even then, Thunderbird is often not fully displayed, as the word ‘Inbox’ appears in italics beneath the email address, with the ‘Junk’ folder below it. Reinstalling Thunderbird has not resolved the issue.

Thunderbird is useless. Every time I restart the computer all my emails and personal folders disappear and gradually start to re-appear hours later. I need a reliable email program that leaves my personal items on my computer.

My question can suffice. Once I installed Thunderbird release over the Thunderbird ESR, I have very slow or no access to messages sent before my account was converted to Graph. Confirm?

I was referred here from Thunderbird Bugzilla report 2081665.

We are experiencing a recurring problem with Thunderbird 153 on several Windows workstations in a business environment.

The important point is that the problem also occurs with completely new Thunderbird profiles created from scratch. It is not limited to migrated or old profiles.

On one workstation this has already happened to three separate Thunderbird profiles.

Typical sequence:

1. Thunderbird 153 is installed. 2. A completely new profile is created. 3. Mail accounts are configured manually. 4. Everything initially works normally. 5. After some time the profile begins to malfunction. 6. Thunderbird Settings no longer open/respond. 7. The address books still exist, but address autocomplete when composing a new message stops working. 8. Creating another new profile temporarily fixes the problem, but the same behavior can return later.

Troubleshooting already performed:

- Troubleshoot Mode - extensions disabled - tested without the existing prefs.js - rebuilt Thunderbird caches and profile UI state - recreated indexes/databases - completely removed Thunderbird from Program Files, AppData\Roaming and AppData\Local - clean Thunderbird installation - clean profile created from scratch - Thunderbird executable and profile paths added to Kaspersky Endpoint Security trusted applications/exclusions

Removing prefs.js from an already affected profile did not restore the Settings window.

A clean test profile initially works correctly.

We have also encountered this behavior on other workstations. Some users have more than 100 message filters and many folders, so rebuilding profiles repeatedly causes significant administrative work.

Several affected computers had Windows user accounts renamed in the past.

We also experienced a separate issue where the Attach File dialog stopped appearing while drag-and-drop still worked. Bugzilla identified this as the already known Bug 2077590, so I consider that a separate issue.

For comparison, after completely cleaning Thunderbird from an affected workstation and installing Thunderbird 115.3.1 with a clean profile, the same workstation currently works normally.

Because freshly created Thunderbird 153 profiles can later develop the same problem again, simply recreating the profile does not appear to be a permanent solution.

Environment:

- Windows workstations - Thunderbird 153 ESR - Kaspersky Endpoint Security - multiple IMAP accounts - business environment

What diagnostic information should I collect from the next affected profile before replacing it?

I can provide:

- Thunderbird Troubleshooting Information - Error Console output - profile file names/sizes/timestamps - Windows Event Viewer logs - sanitized prefs.js - comparison with a working fresh profile

Bugzilla report: 2081665 Known separate attachment bug: 2077590

I've noticed that Firefox can sometimes consume a significant amount of RAM when I have multiple tabs open, especially when browsing websites with images, videos, and other media.

I would like to understand:

• Does Firefox handle memory differently compared to other browsers?
• Which built-in Firefox settings can help reduce memory usage?
• Does enabling or disabling hardware acceleration make a difference?

Is there a recommended way to identify which tabs or extensions are consuming the most memory?

I'd appreciate any practical tips or recommended settings to improve Firefox's performance without affecting the browsing experience.

Last update seems to have broken something. The app constantly seizes, freezes, acts like it's crashed, takes over the device OS such that back and minimize buttons don't work, tab access button non-functional, so I can't even close the page that's stuck

In thunderbird when I select Help/Troubleshooting information and than click Open Directory at Profile Directory nothing happens.

Operating System: Fedora Linux 44 KDE Plasma Version: 6.8.2 KDE Frameworks Version: 6.31.0 Qt Version: 6.11.2 Kernel Version: 7.2.13-200.fc44.x86_64 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz Memory: 16 GiB of RAM (15.5 GiB usable) Graphics Processor: Quadro RTX 4000

The GPU isn't working properly... I've attached screenshots of the browser I have installed. If needed, I can take any logs, etc. It's very frustrating - I have a fairly old processor and its GPU isn't working properly! If needed, I can create a thread on the forum and attach any information about my system. Sorry if I'm in the wrong place! Best regards, and thank you for the best browser in the world!