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First, this post is basically Congratulations for Firefox upon working almost flowlessly under this extreme heavy load without crashing. Saving/loading sessions works well. (which is unexpected but makes me _very_ happy :-)) Firefox exits properly without any exceptions, no matter how long it runs, or how many times the PC is sent to STR mode meanwhile.

Second, everything is fine, except RAM usage. No matter how many RAM is installed, Firefox takes up all of it after a few days of normal operation. I have recently upgraded my PC from 16 to 24 GB of RAM only for this sole reason to see if anything changes, but it did not produce any noticable change, except that it takes 5-7 days for Firefox to fill up all the RAM instead of the 3-4 days before. Disk space on C: drive was nullified by Firefox as the paging file went up to 50 GB.

I want to hunt down this thing. I have approx. 300 tabs, 2 addons, and Hardware Acceleration is disabled since otherwise Fox hangs several times a day (have to be killed from outside). Pics are attached. https://addons.mozilla.org/hu/firefox/addon/tree-tabs/ https://gitlab.com/kroppy/TreeTabs

I'd like to get suggestions where to start.

1. Disabling or replacing the adblocker ?
2. Inspecting memory usage on Process Manager (about:processes) and Task Manager (about:performance) pages ?
3. Installing some external tools like Firemin ?

Please don't suggest neither safe mode nor disabling all addons, since that makes it impossible to reproduce this amount of load, which is the primary reason behind the symptom.

I PrtScr'ed Process Manager and Task Manager, see that RAM sizes per page are normal in Task Manager, but not in Process Manager (10 times more).

CPU usage is totally normal for this load, even when memory is in the heaven. See the TaskMan pic. (I suppose that's because of ad blocking)

Thanks for any ideas,

Peter B. (I'm PC enthusiast)

-- Windows 7 Ultimate SP1 64 bit Firefox 106.0.5 (latest autoupdated) no firewall nor any antivirus - since 20 years with no infection ... AMD FX-6350 Six-core ASUS M5A99FX PRO R2.0 24 GB DDR3 1600 MHz Sapphire Radeon HD 5750 1GB (AMD Catalyst 15.11.1, Nov 18, 2015)

Dear Thunderbird Technical Support,

I hope this email finds you well. I am reaching out to seek assistance with two recurring problems I have been experiencing while using Thunderbird as my email client. I have encountered connection timeout issues with both Gmail and our company's website servers, as well as SMTP failures when attempting to send emails. I would greatly appreciate your guidance and support in resolving these matters.

Here are the specific details regarding my setup and configurations:

SMTP Configuration: Server Name: smtp.gmail.com Port: 465 Connection Security: SSL/TLS Authentication Method: OAuth2

While using Thunderbird, I am connected to the internet through VPN V2RAYN. However, despite configuring the SMTP settings as provided above, I am facing difficulties with both connection timeouts and failures when attempting to send emails.

I kindly request your assistance in troubleshooting these issues and providing any necessary steps or recommendations to resolve them. It is crucial for me to have a reliable email client, as efficient communication is essential for my work.

If you require any additional information or logs, please let me know, and I will be more than happy to provide them promptly. I understand that resolving these technical issues may require your expertise, and I appreciate your time and attention to this matter.

Thank you for your assistance. I look forward to your prompt response and guidance.

Best regards,

I have a very small Tablet computer and Thunderbird is really bogged down on it. The tablet has a 32 bit processor, 1G RAM, 64G SD drive. (1) When I run TB I get many "not responding" messages from Windows. (2) Maybe 1/2 the time, if I "delete" a message the screen will freeze on the message. The message is removed from the inbox list. I have to click "X" to get rid of that screen. (3) Get Messages no longer works. When I click it, nothing happens. The status bar at the bottom remains on the last information displayed. I found that if I use View, Folders, All, I can bump TB to get messages. (Normally I use Unified Folders) The status bar will display each of the accounts it is checking and any new messages will appear. These things have been happening through many many versions of TB. Although #3 seemed fixed a few weeks ago but has returned. Same for #2.

I looked at the disk space that TB is using and found that TB is using over 10GB. See attached. I don't know why it is so large. I don't need to store any messages on this computer. I have a desktop that is my "base station" where I want to save all (but deleted) messages.

I don't know if this large amount of TB space is contributing to the problem. Any help would be appreciated.

Hi, My inbox shows that there are messages in the inbox but it does not display them. Any action on the inbox gives the msg. "The current operation on "inbox" did not succeed. The mail server for account (my Optimum acct) responded: IMAP4 server terminated connection." I can see the messages on the Optimum website.

I forwarded my incoming mail to a Gmail account and can see the incoming msgs there. Also as can see them on my Apple phone.

Upgraded to latest version of Thunderbird. No help. Other folders seem okay. When I look at the ImapMail folder, I see the msf file for INBOX but I do not see a file for the inbox emails.

I am on Windows 11 and use MS Defender for security

Please help - Thunderbird is my workhorse and contains all my important files. Thank you! Carol

Hello, I upgraded this morning TB to the latest version 102.13.0 but my account on office 365 is not working properly. I cannot forward messages anymore and the messages that I send have no content.

I am using Exquilla for Microsoft exchange and there is something definitely wrong since the upgrade was done.

Can you support urgently?

Best regards,

Fadi

I have created a HTML signature, defining the font, size, color and bold - as below However, the color is not taking effect and remains black, despite it showing so in web based html editors.

EG:

My sig text here

I installed a new Thunderbird because my 12 year old installation had 187 GB!!! Then I saw that the new installatinio is growing!! every day about 2 GB. The growing thing is imapMail ... I have only ca 1500 mails.

Hail:

System Software: Win11Ent_x64 v22H2 (b: 22621.2283) MFF v18.5.0.0

No matter what I try, my MFF keeps crashing at startup. For some reason, it tries to open 2 pages the windows at the same time, which is illogical. I deleted firstly my: sessionstore.jsonlz4 logins.json to no avail.

Then I tried to open MFF through elevated CMD with the command: C:\Program Files\Mozilla Firefox\firefox.exe -safe-mode Again, 2 windows pop crashing immediately.

I do not understand why all of the sudden, it tries to open 2 different instances at once. This makes no sense. I am out of ideas, having tried many an option found on Google, but which none give me a solution.

If anyone has an idea, I would be quite darn thankful. This MSEdge crap that I need to use now is not quite my thing.

Thank you. Ke'Ylan

I am using the latest version of Firefox with Mojave on a Mac.

Lately I have experienced slowness despite the fact that I didn't add any software and I have Norton checking for viruses. Recently I got a message "Your system has run out of application memory" when I had 5 tabs open in Firefox. I checked Activity Monitor and it showed Firefox using 1.16 GB. 7 other apps were open, the next one with the highest memory usage was Mail (465 MB). Activity Monitor showed 30 instances of FirefoxCP Isolated Web Content entries.

I attached a screen capture showing what Firefox was using in one of these instances. Is this "normal" with 5 tabs open?

I closed the open tabs and quit Firefox. Memory usage by Firefox went down, but after a short time the problem happened again.

A search on the internet showed lots of similar complaints about FirefoxCP Isolated Web Content. Is this a known bug? Any way to avoid this problem?

Thanks.

firefox is my goto browser-tons of bookmarks etc-always kept UpToDate along with my dell MS10 laptop - today laptop boots up fine, outlook and MS edge work fine, but firefox will not start up, even in Administrator mode - searched for help - tried the run command firefox.exe -p, and also tried to create new profile ( as suggested ) that didnt work either- i would hate to uninstall and reinstall ! any help besides that ?

Hi,

My Thunderbird auto updated this afternoon to 115.3.1 . Now I am only seeing message headers. The body of the messages has disappeared. I'm not seeing anything on the bottom half of the screen, not even the message tool bar where you can delete, reply, etc..

Strangely -- the very same thing happened to me six months back with a secondary account, but my primary account was unaffected. So I was using the email interface with one email address (same domain name) which worked fine, while the secondary one only showed headers, and not the actual messages.

NOW-- after this download, the secondary email address account is showing both the headers and the messages, while my primary account is only showing the headers.

PLEASE HELP. Posted here six months ago for the previous time but never got any solution to the problem then. Just lived with it, as it was a secondary email address, but I will have to leave Thunderbird if I can't get the primary address showing actual messages soon.

Thanks in advance for your help!

Zach

I have been a Firefox user for most of my time on a computer and that's a lot of years. A regular site I visit is Townhall.com. A few months ago I could no longer play videos because the link (video screen) would not appear. The text below where the screen should have been appears. I worked with Townhall on this and we could not solve it. Interesting was that periodically the link would appear but now doesn't appear at all. So I am forced to use MS Edge for Townhall videos.

Then it happened on another site I frequent - RacerX.com. When I try to play a video I get a blank screen with the message: "Unfortunately your Targeted Advertising privacy settings prevent us from showing you this YouTube Video. Please update your consent to see this content." I cannot find anything in settings which should cause this. I changed nothing. Settings are the same as they've been for years. So now for RacerX videos I have to use MS Edge.

I would prefer to continue to use Firefox as my browser but switching back and forth is not productive. As much as I do not want to make MS Edge my default browser it looks like I will have no choice unless you can help me solve this issue.

Hello Firefox Support Staff,

I use Firefox on a Windows 10 desktop PC.

Firefox often crashes when I close the browser by clicking the X either at the top right or the tab.

Please let me know the type of information you need to debug.

Thanks, Sam

Every few days, when I'm actively using Thunderbird (v102.5.1 32-bit, on Windows 11 Home), a white rectangle appears at the top of the page (see snip attached - if 2 appear, delete 1). The interesting thing is that this box persists IN THE SAME SCREEN POSITION, EVEN WHEN I MOVE THE THUNDERBIRD WINDOW AWAY. It overlays everything else on screen at that position, making use of any icon or button beneath it impossible. However, by moving the cursor across the box, it is clear that whatever is beneath IS being recognised by the cursor (as it changes style when above a button etc); clicking at that place does activate it (eg opening a file from a desktop icon). I have found no way of removing the box (which can't be moved) other than rebooting the PC. This anomaly was happening BEFORE both the upgrade to Windows 11 (from 10) AND recent Thunderbird upgrades. I can find no clues from searching here or elsewhere - help would be much appreciated. Thanks

This has been happening to me with recent updates of Firefox, and I am very close to dumping a browser that I have used for years because of it. I go to load pages and it just sits there and spins and spins. In the time I take to open another browser like Chrome and copy and paste the exact same links into Chrome, where the download of the web page is practically instant. I go back to Firefox and it is still spinning and it is just ridiculous. I have no clue what would be causing this. After it finally loads a page, it seems fine on subsequent loads of pages.

I play a game at Vegas World. It's basically a free online slot machine site. I have played it for years with Chrome. Recently switched to Firefox. Playing an auto spin slot game, Firefox gets slow and hangs after about 25 spins. Chrome will go for 10,000 spins. So, Firefox is useless on game sites. I don't really expect a fix or solution. And I don't actually expect to use Firefox by the end of the day.

Since updating Thunderbird, I cannot access my Microsoft account. It shows the 'Authenticated but not connected' error message. I can access my emails on my mobile phone but not on my computer. I have changed the disable IPv6 to true, deleted my stored password and entered it manually .... nothing seems to be working. Any ideas? Thanks in advance

After the most recent update, when I delete any message in Thunderbird it quickly scrolls, often to another section of the message lists (I can't tell if it's always going up or down). I have to keep scrolling back to where I was before. The other night I had to delete a lot of email and this became really hard to do with all the auto scrolling. This wasn't happening before the last update.

I've encountered a very weird behavior: when selecting where to save a file or selecting a file to upload, the browser hangs 100% of the time.

Even when I go to about:memory, click Load, the path selection window appears - regardless of whether I select a file or close the window, the browser hangs and the window stops responding. I tried waiting for several hours - to no avail. Only restarting helps. Same with the upload selection window - regardless of whether I selected a file to upload or closed the selection window, the browser hangs. Before freezing permanently, the mouse cursor stops moving, then lags around a bit before recovering.

I tried cleaning download history, cache, recreated profile, restarted without extensions, in safe mode, disabled antivirus - always the same result.

Please advise me, maybe someone has encountered something like this - I really don't want to start using Chrome. My OS is Windows 11. Thanks in advance.

On my laptop (121.0 on doze 10) I have no problems but on my desktop Firefox (121.0 on doze 10) started to struggle with Google a few months ago. Sometimes the Google site doesn't load, sometimes it loads but doesn't connect (no auto-complete, no search) and if it does work the result links often don't load when clicked. It's like Google falls asleep and then, when it wakes up, all is fine, until it nods off again. I have followed advice provided, cleared cache, cleared cookies, removed plugins and extensions, reinitiated and reinstalled. Running in safe mode seems to help, as in pages seem to load faster, but sadly does not eliminate the problems. Other browsers on this machine are not affected. No time sync issues.

Any suggestions?

TIA