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Immediately after restart and subsequently starting Firefox 153.0.3 my Windows 11, 16GB system shows that Firefox has started 11 processes, five of which account for most of the 1.2GB of RAM used. Why does Firefox run so many processes, and how can I make it use less RAM?

I see others are having this same issue with no resolution in sight.

The company I work at is unable to print anything through the print preview in Thunderbird. The current work around is to download, open, then print the file.

Does anyone have any further information on this subject besides going through separate avenues to fix the problem?

Thanks!

henn typing website keeps going to about blank/ crashes all time/ locks up unable to open sites like home depot/autozone xtra slow respondes. must be time to use something else firefox has gotten unusable

Hi All,

Thuderbird 140.12.0esr (aarch64)

iMac 24Gb M4 Chip macOS Tahoe 26.4

When I request a search through Unified Folders Inbox for 10 email addresses using Quick Filter, CPU goes to 80% or more, and response is 10-15 seconds. Main search appears to be ok. Only add-on was a printer service but has been disabled and problem still remains. In troubleshooting mode, search still causes high CPU, even though I can only search one email address. Just started about 2-3 days ago (around 17-18 June).

Any ideas?

Thanks.

I keep email tabs open if I am going to have to reference the email for some reason -- shipping product tracking emails, legal documents, threads of conversations that are ongoing. Every so often, Thunderbird decides to open with all of the tabs blank. It's unrecoverable, and I have to search each of the tabs I really needed to open up again after spending time X ing the blank ones.

I've been filing about this bug for years now. Mostly what I get is a bored moderator/mentor telling me why that isn't a priority, and how I should change my emailing behavior. I just lost track of several legal documents and am anticipating working for hours to get them back on top.

I'm very sick of it.

So ever since the desktop browser got updated i have been experiencing critical crashes and lag where my pc screen freezes and then goes to black until i restart my graphics card and quit firefox in addition to tabs crashing and very weird performance issues overall, any fixes for this issue?

I realize this can be a macOS issue as the problem appeared when I upgraded to 26x but I'm hoping that maybe there's another way of allowing windows to be moved with a mouse. This issue appears only under tbird and not under any other Apple or non-Apple products.

The new child window(s) opens up in the default location(s).

The issue has survived several OS updates up to the current one. I switched from macOS 15x to 26x in around January 26.

Firefox does not really open any child windows that I could find but browsing windows work as expected.

when I use Firefox continuously for a long time..., it’s it’s continuously become freeze and kick me out ....I need a solution of this...as soon as possible. .And i also need the group folder create feature like chrome

Thunderbird causes my machine to 'hang' from time to time,

1. often for up to a second and usually a number of times in quick succession on each ocasion. Sometimes this happens frequently - say every 5 or 10 minutes - sometimes only after an hour or more since the past occurrance.

2. My machine hangs completely - nothing will work, mouse, keyboard, sound, other apps etc. If I happen to be typing (into any app - including Thunderbird - when this happens, input ceases, the cursor freezes and - if the problem persists for a second or two, Windows reports "[app] is not responding"

3. I cannot be certain, but I believe the problem occurs whilst messages are being retrieved.

This is a very serious problem as it means that I can never leave TB running as the problems it causes are not acceptable.

4. This means I cannot deal with incoming messages without periodically re-starting TB - which is an utter PIA.

I am running Win 11 Professional on a 2-year old machine with 64 Gb of memory. I have run TB in Troubleshoot mode, I have confirmed that the problem occurs regardless or whatever other apps are running (or none) and I have proven conclusively that no other app causes any kind of similar problem.

Looking forward yto hearing if others have had the same issue and what can be done about it.

Your site has been freezing daily, mostly twice, in last 3 moths or so - on different networks and different devices, causing me to lost relevant data. As your avid user for long time, I am considering to switch in spite of familiarity. Do better for you current and potential new user as I am very much unlike to recommend you and use anymore. Sincerely.

If Thunderbird startup is stopped before tabs are loaded, they are lost. The tab fields at the top of the screen remain but they are empty. Evidently, tabs are stored only in a temporary location. This is a very annoying bug. Is there a way to recover them?

what and who is meadow and why am i getting comcast mail sooner than thundershower it is just to slowit used to come up so much faster id get the new mail quicker now its so slow aand i do not want to uninstall and reinstall and lose my contacts and my extensions please if you know why so slow please let me know i know i sent one like this earlier but i though maybe gibving it time would be better but no it is not

plz guys help me my eyes hurt so bad because of this

every time i open firefox for pc, a white flash appears very quickly

i tried every thing ai told me to, but still

i cant even record it it doesnt appear in video

I HATE this new mail program. It takes forever to load on my computer and is VERY slow. Is there any way to get the old program back? I am 83 years old and find this version very difficult to use. I had the older version for years (more than I can remember) and it was very easy to use. Is there a way for me to get an easier program -- like the old one. Please help me

Title: CardBook 104.7 folder pane frozen ~40 minutes at every startup - TB 140.8.1 ESR - Linux Mint 22.3

Environment: - Thunderbird: 140.8.1 ESR 64-bit - CardBook addon: 104.7 - OS: Linux Mint 22.3 Cinnamon 64-bit - Fresh install of both Thunderbird and CardBook - 3 Gmail IMAP accounts - 5 CardBook address books, all local FILE type (.vcf files in /home/nesko/cardbook/), no CardDAV or remote server involved. Largest address book has approximately 1500 contacts.

Symptom: At every cold startup, the CardBook folder pane (address book list) is completely frozen and unresponsive for approximately 40 minutes. Thunderbird itself starts quickly and all email accounts and other addons function correctly. Only the CardBook folder pane is affected. After approximately 40 minutes CardBook becomes responsive without any user intervention.

Error console output at startup consistently shows: - TypeError: can't access property "addEventListener", currentWindow is null (implementation.js:28:13) - TypeError: can't access property "document", currentWindow is null (implementation.js:567:15) - CardBookXULNotifyListener.js:599:13 - Content process is not responsive while sending DevToolsProcessParent:watchTargets

Additional observations: - On one startup, 8 duplicate CardBook tabs appeared simultaneously when TB's content process finally became responsive, suggesting CardBook was retrying initialization multiple times while waiting for TB's window - Running TB in Troubleshoot Mode (all addons disabled) confirms TB itself is healthy and starts quickly - The errors reference CardBook's own initialization code (CardBookXULNotifyListener.js) attempting to access Thunderbird's window (currentWindow) before it is fully ready - TB's content process unresponsive message appears during the same startup window

Steps taken so far: - Unchecked "Keep messages in all folders" in Synchronization & Storage for all 3 IMAP accounts — this improved overall TB startup time - Unchecked "Run synchronization at Thunderbird startup" in CardBook Preferences → Sync — this reduced the CardBook freeze from over 1 hour to approximately 40 minutes - Reported to CardBook developer at cardbook.thunderbird@gmail.com

Question for TB support: Is there a known issue with TB 140 ESR's content process initialization timing that could cause addons to fire before TB's window is fully ready? The currentWindow is null errors suggest CardBook is initializing at a point where TB's window object does not yet exist. Is there a TB-side fix or workaround for this timing issue?

Hi,

I'm running the latest version of Thunderbird 140.12.1esr on 15.7.7 (24G720) on an M1 processor.

I'm witnessing Memory leak > Thunderbird who usually use 800MB jumps to Gb up to 60Gb

It makes this version unusable.

Here is a loom of the incident: https://www.loom.com/share/0b8e661b42d64d749d80adfd71fd1e04

+ a screenshot

Anyone can help ?

Best Olivier