Semua Produk Community Forum

I just had a support session and the tech was unable to solve the problem. We tried installing a new version of Thunderbird and importing the messages over from the default install and it just freezes up. He tried replacing account settings with the account settings from a previous version and that didn't work either. He suggested contacting Mozilla to see if there was a way to import messages from the frozen default to my new profile.

Hi there. I keep getting a pop up that says my computer is infected, etc. It pretends to be windows with several buttons to cure the problem... When I to into security settings windows says it blocked it and gives me the correct time that it was blocked. It keeps popping up even with the Firefox browser. When I watch a movie it does not pop up....??? Movie on u-tube. Thank you for any thoughts. Ok , here it is again.. In a different form..."Your Norton has Expired. " It has a button for "Enable protection" and a protect and close button. The address is d6megpo029pc73bd7vt0.visolabala.co.in I was unaware that I have Norton protection. It offers it at 29.99 per year. It has a "protect" or "close" button under that. I normally click of the faint "X" in the middle of the right of the page. If it is Norton, I would like to sue them for infecting my computer. But I don't think it is Norton. thanks again for your thoughts.

CH

When viewing pdf files created from MS Word (.docx) documents and sent to me I see white lines across some images but not all. This happens with Firefox on Windows 11 and linux mint (various versions). It is present on the images from the file as received and after uploading to a website. The images are OK if viewed using Opera or other browsers but the same problem is present on Thunderbird. The file below has the problem on 2 images when viewed on Firefox. https://www.kass.org.uk/Documents/NewsletterFrom251114/20260304%20March%20Newsletter.pdf I have caused the writer of the article a lot of trouble because I blamed her file which seems to be OK. Can you help? Thanks Brian

[6/12/26, 10:49:22 PM GMT-4] Applied filter "Blocked Sender List" to message from The Home Depot® Consumer Credit Card <citi@info15.citi.com> - James, Don’t forget to use this special offer to get your Summer projects going! 🌼🌺 at 6/12/26, 10:02:27 PM GMT-4 deleted

[6/12/26, 10:49:22 PM GMT-4] Filter action failed: "Move failed" with error code=0x8000FFFF while attempting: Applied filter "Blocked Sender List" to message from The Home Depot® Consumer Credit Card <citi@info15.citi.com> - James, Don’t forget to use this special offer to get your Summer projects going! 🌼🌺 at 6/12/26, 10:02:27 PM GMT-4 deleted

The sent message is deleted but I get Filter action Failed.

I'm experiencing a strange issue with Firefox. Some websites are not loading properly, including my own website, YT Thumbnails. In some cases, pages load partially, while other times they remain stuck loading or display missing content.

I've tried refreshing the pages, clearing the cache, and restarting the browser, but the problem still persists.

Has anyone encountered a similar issue in Firefox? Could this be related to browser settings, DNS, extensions, or network configuration?

Any help would be appreciated. Thanks!

June 15, 2026

Dear Mozilla Firefox:

Re: Very Transient Search Specifications

Having disabled AI search capabilities satisfactorily, I am now plagued with re-establishing search specifications innumerable times a session. I open a tab. I set my safe search requirements followed by several items under “All Search Settings,” then save and Exit. I open a new tab and repeat all the steps. I back up out of that search list, not backing up past the window with the saved settings to find they are nevertheless reset back to default, necessitating that I repeat all the steps. I leave this window of Firefox open but minimized and open a new Firefox window and repeat all the steps.

Of what use is saving the settings? They don’t persist within tabs, across tabs, or across windows. These inconveniences began with the introduction of AI services to Firefox. Yes, I delete cookies and set other parameters in the name of privacy, but not with the expectation that saving search settings during a session will prove meaningless. Please let me know and understand how to have both privacy and utility.

A long time Firefox user and supporter.

I recently updated windows and since then I have not been able to login to my emails and or recover contacts or calendar on thunderbird. I am able to login to my primary email but I have no contacts and am not able to login to my other 2 email accounts.

Hi.

Why i need every time i restart the firefox esr accept the cudy.net certificate? Look the picture.

Is there a way to add it as exclude this certificate and NOT ask me every time i restart the firefox esr to accept this certificate?

Hi all! I'm having an issue with Thunderbird in conjunction with my Outlook account.

I used to be able to add my account just fine (using OAuth2). But for a few months now, I have been getting "Authentication failed" errors (see first picture).

It used to be that I could temporarily remedy this by signing out and back in. Today, however, I was unable to sign back in, using the stock settings for Outlook (see second - fourth picture). No authentication popup appeared.

I was sporadically able to add the account and get messages to start appearing by clicking on "Edit configuration" and removing and re-adding the hostname for the IMAP server, without an authentication popup appearing. I therefore suspected that there might be some half-stale credentials stuck in the cache, and there probably were, because after clearing my cache this method doesn't work anymore. I am still not getting any authentication popup though.

All the usual suspects I already tried: Thunderbird is up-to-date (151.0.1), my Outlook account definitely has IMAP and SMTP activated, and another mail account (gmail) works without a hitch on the same system.

I hope that someone can help me, as I'm at my wit's end. Thanks in advance!

Good morning. We have McAfee Ultimate with email scam protection. Our "att.net" email was hack 2 weeks ago. We have changed "att.net" passwords. We began to again receive emails. on 6/14/26 we began receiving this message when trying to down load emails - "unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox" We deleted emails found in the McAfee Alert mail box. We deleted the "att.net" email from McAfee and then reconnected it. we have gmail accounts and deleted trash. any thoughts for how to correct will be appreciated. jimw

I have a new laptop and installed Thunderbird. It shows lots of messages in all the folders, but will not show any messages in the message screen. It just continues to show the opening logo