All Products Support Forum

I am setting up a new Windows 11 Computer and am trying to install Thunderbird. I have downloaded TB (Thunderbird Setup 115.10.2) to my Download Folder. I double click on that file to run the Setup program, complete the user account information and TB and select Continue. TB completes the search and displays the correct account (att.net) connection information, SMP, POP3, Ports, etc. I select DONE and the Checking Password box displays. It runs for a few minutes and an Error message displays: "Unable to log in at server. Probably wrong configuration, user name or password." If I select Configure Manually, a window displays showing the correct configuration information (I have checked it four times). I will note that "Normal Password" has been selected for Authentication Method in case that is important. I have tried this method several times and get the same Error message. Any help will be greatly appreciated. Thank you.

I have attached a screenshot of the configuration window. Note: My account is with att.net but I am still using my old pacbell.net account that was merged with ATT many years ago.

duplicate of /questions/1446872 thread.

About tab crashes Every time I open Firefox, it crashes immediately and does not trigger the crash report window. Even though I have checked and enabled the option to send crash reports in the settings, it doesn't work. When I look for crash report logs, it shows that I have not sent any crash reports.I've tried many methods to view the crash report, but it just shows that there are none. I only found this information related to crash reports in the installation files.(you can see it in the picture)，hope someone can answer this question, thank you very much.😭

Ubuntu 22.04, TB 115.10.0 (64-bit). A system update occurred recently, and TB was in the list to upgrade. Now, TB transacts email & such w/o problem. However, when I use the window exit ('X' upper right corner) or the File ->Quit choice, a status bar shows "Clearing Trash" or the like, and remains on the desktop. Eventually a system message appears that TB is not responding (wait or force quit). Nothing happens until force quit is used.

Same behavior screen is seen if I try to use the TB troubleshooting menu option.

Any suggestions how to diagnose this? Thx.

I have had message filters set up for a long time. Recently I tried to make some changes (adding one filter, deleting others, changing the response). I find that if I close Thunderbird and reopen it, all my changes are gone! How can I get the filter changes to stick?

So I'm having issues playing 4K videos fully on one YouTube channel: https://www.youtube.com/@ClearviewDriving

For some reason anything above 1080p gives me bad stuttering but on other channels videos don't stutter or freeze when playing 1440p or 4K quality.

Firefox is updated, I don't use Extensions other than Ad Blocker and I have that off on YouTube anyway. Seems strange that it'd only affect one specific channel.

I have a very good gaming PC too so the hardware isn't the issue.

I'd like to be able to open a link in private mode by holding down some modifier key, then clicking on the link. There are many times that I want to open a link in private mode, and a keypress + click would be the quickest way to do it given that one hand typically remains at the keyboard while I use the mouse/trackpad.

I've even added a toolbar button to open a new private browsing window, then dragged and dropped a link onto the button, but that gets a circle with slash icon and nothing more.

Others have asked this question, so, to be clear, none of the following address my question: copying the link then opening the private browsing window & pasting the link, using a customized shortcut/bookmark, opening Firefox in private mode via command line, right-clicking the link then selecting "Open link in new private window".

Thanks for any advice and thank you, Mozilla, for Firefox!

The increase happened here: /storage/permanent/chrome/idb/3870112724rsegmnoittet-es.files/

79 files taking 590MB created in 3 minutes, out of nowhere. Why were all these large files created?

Using Linux Mint, Firefox 125.0.2

I have read through the user threads and tried everything I could find including malware searching and, of course, setting google as my search preference but no matter what I try the splash page for Firefox (re-installed twice) is Yahoo. Has anyone found a cure for this issue on their Mac - my Mac parameters are in the attached screenshot.

Thanks for any sage wisdom!

just lost several hundred tabs on Firefox mobile right after it updated itself. The most recent tabs show only ten of those tabs, which were all opened and closed today and aren't part of what I need to restore.

How do I get my tabs back? I've seen no 'restore previous session' option. My laptop only shows the few I have open now. What do I do to restore them?

With the exception of the Home and Catalog pages in the yotsuba theme, all boards default to black and only on Firefox, not Safari or Chrome browsers.

Any idea how to fix this? I'm looking to get back my default Yotsuba theme.

I want to change the line spacing in my emails to single line including paragraph spacing. Advice given in previous posts says to select Menu then Options. I have clicked on the 3 bar Menu icon and Options is not there. I clicked on Tools in the Menu Bar and Options is not there either. I apparently have to get to Composition, but cannot find a way of getting there.

I use google as my default firefox home page on my HP laptop. recently a second tab opens at the same time. "how to set the home page" --I've tried closing it and restarting the laptop, but it continues to pop up every time I open firefox as a 2nd tab. I am/was happy with my homepage opening to google. How can I get rid of this second tab. thanks

When attempting to load a number of different web pages such as Quickbooks Online Apps, the page displays "Loading Apps..." with a spinning wheel, but never redirects to the Apps page; the site hangs forever. On other browsers there are no issues; it eventually switches to the correct page. In Firefox Browser I have tried adding exceptions in Settings --> Privacy & Security --> Manage Exceptions. No change. Thoughts?

Today I noticed that typing characters with accents like á, ã, â, etc. doesn't seem to work at all from firefox, they all end up ignoring the dead key and just typing the letter itself. It can render them just fine and I can paste them from another app normally too, but actually typing them is impossible from firefox.

After trying to troubleshoot, I eventually found out a few things: - iBus is not at fault, since it works in every other app and I even restarted it, but the problem persists - This only happens in my main profile, newly created profiles don't have that problem - The problem still happens on troubleshoot mode (as long as it is my main profile) - Compose key also doesn't work (I don't want to use compose key anyway, because my keyboard has specialized dead keys, but I at least tried it)

I suspect the problem lies in a setting on about:config that's different from newly created profiles, but I have no idea which and Ctrl+F searching this site doesn't show any relevant configuration that might be the culprit.

I am running Firefox 126.0-1 on an Arch Linux system. Most websites are failing to connect for security reasons.

Some sites, including google.com and nytimes.com, fail with an "SEC_ERROR_UNKNOWN_ISSUER" error, and their certificates confirm that they are respectively issued by Google Trust Services LLC and DigiCert Inc.

The website archlinux.org errors with "MOZILLA_PKIX_ERROR_MITM_DETECTED", stating that "Software is Preventing Firefox From Safely Connecting to This Site", citing in particular ISRG Root X1 as the problem. The certificate confirms that it is issued by Let's Encrypt.

The website duckduckgo.com simply errors with "SEC_ERROR_PATH_LEN_CONSTRAINT_INVALID" and states "Secure Connection Failed"

I have confirmed in preferences that my proxy settings are set to "No proxy" and the problem persists across troubleshooting mode and making a new profile. I have also tried removing the cert9.db file in a given profile folder.

I just updated to the latest version of Windows 10, and now when using Firefox (126.0), the url dropdown menu rather than dropping down now "floats" over the browser window with the top cut off. The top url is still there, and I can navigate to it using the arrow keys, but it doesn't show. This is new as of this morning, when Windows updated. No issue in other browsers.

I've recently decided to switch to Thunderbird from Windows Live Mail, which is no longer supported. I also use Mailwasher PRO which displays emails on the server and allows me to delete unwanted emails from the server. If I download emails to Thunderbird, I expect them to be stored automatically on my PC. However, when I subsequently delete them from the server, using Mailwasher, they are deleted from the inboxes in Thunderbird as well.

I'm guessing it's a setup issue but am struggling to find what is wrong. Thanks in advance for your help.

Using Thunderbird on Linux I cannot delete any local folders, when I try to delete them I get more copies of the folders on reopening Thunderbird, after the system says it is "not responding" and I close it down. I have tried several times and now have multiple copies of the local folders I've tried to delete.

Attached image, how is it possible that Thunderbird allows Bit Defender to install a spam add on and then protects it to so I can't remove the add on ?

This is just mind boggling.

Further, there is a "Why" link which should explain any logic to doing this, note there is not, and it explains nothing of the sort.

I have better things to do than run behind thunderbird to delete an extension which thunderbird has allows to "Can't be removed".

Is thunderbird with us ? or against us ?