All Products 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

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!

Hello,

I want to make Saved Searches

So the 3rd step is to choose your folders.

I have a TON of folders and mostly I want to

Start from all folders and only unselect a few of them.

But here it starts from all subfolder collapsed and all folders unselected.

So for me the first step is to manually expand all folders, and subfolder and subsubsubfolders and so on.

And then go down the entire list and select every single one.

And THEN start from the top of the list again and now, choose which one in particular I want to exclude.

I know this sounds like, I should just check the ones I want to include.

But for some reason, that feels completely impossible to do. I can only unselect the ones I don't want and it feels impossible to only select the ones I want "which is all except a few"....

Usually, I never make it to the end and just give up before I get to the stage where I would start unchecking the ones I don't want.

So, this is the reason for this question.

"In Create Saved Search, Choose Folder dialog, how to select all and expand all folders ?"

I got charged for a VPN and make sure that it wasn't I was not able to cancel the subscription in time because it said I didn't even have a subscription that it wasn't even going to charge because there was nothing even signed up. today I get charged for the service and I never wanted it. Please advise on what's the next steps.

The last 2 days Firefox has not been saving my open webpages

I checked my settings and it says I am set to reopen settings, but it is not doing it.

I do genealogy every day so I need my tabs to open...it lost the tabs I was going to work on the following day that I wanted to work on.

Also when I turned computer it wanted to make Firefox a default and it already is...It used to allow me to reload recent activity pages, but it did not after my Firefox crashed...it only listed about 10 pages,

I thought it may have crashed because I turned it off with 250 pages open, but it was very late and it would have taken me hours to look at all the open files

It took me a few hours to get some of the pages back, but I lost track of a lot of files I wanted to work on, but I lost track of many :-(

I am not a "techie" so I hope Mozilla support can get me back to being able to have Firefox save tabs again for me...I promise not to leave 250 files open again...that is the only thing I can think of that caused everything to crash

Thank you J

I recently started to have a printing problem in Firefox on Windows 11. My Brother DCP-T720DW works fine with other applications like Word and Notepad, but when I try to print from Firefox, sometimes I get a "Printer not available" message or the print dialog incorrectly shows the printer. For troubleshooting, I uninstalled and then reinstalled the printer driver following the official Brother download page: https://support.brother.com/g/b/downloadtop.aspx?c=us_ot&lang=en&prod=dcpt720dw_all Since that didn't fix the issue, I also downloaded and reinstalled the driver from: https://printerdrivers.com/brother-dcp-t720dw-driver/ Windows detects the printer and is able to print test pages, so it looks like the problem is only with Firefox. Here are the things I have tried: Restarting both Firefox and Windows Uninstalling and reinstalling the printer Resetting Firefox settings Running Firefox in Troubleshoot Mode Making Brother printer the default one

Has anyone else had the same issue in which Firefox refuses to detect a printer that works correctly in other applications? Is there a print setting or preference in Firefox that might cause this? Thanks in advance for any advice.

Unable to upload any images to Gemini. Working fine on all other browsers. Images always fail unless security levels set at lowest. When the do upload the action button does not become active

I don't wish to use the calendar that comes with Thunderbird, but instead continuing with my Macintosh iCal.

1) How do I switch off the Thunderbird calendar function? 2) How do I get the calendar invitations sent to me as an ICS file attachments, that I can open in Mac iCal. Just like in Airmail and in Microsoft Outlook.

Jonas Möller Nielsen Sweden