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My Thunderbird install updated from 140.13.0esr to 153.0.2esr yesterday and now I can no longer drag and drop any attachment from an email to any folder on my computer. I simply get an error message window with a title of "Error Moving File or Folder" with "Unspecified error" text. See image attachment.

I've tried a variety of folders, including Downloads, Documents, Pictures and other folders on local and external storage devices.

I can save the attachments using the Save All button, or by right-clicking a file and choosing Save As, but not by dragging and dropping as I have done so for years.

I have checked if Thunderbird is running in admin mode, which it is not, but have tested it both ways with the same problem occurring. I have also run Thunderbird in Troubleshoot mode, and the same thing occurs. I tried clearing the startup cache from the troubleshooting page with no change. Restarting the PC did not resolve the issue, and disabling my anti-virus(Avast) also did not make a difference to the issue.

Check https://piunikaweb.com/2026/08/14/firefox-x-images-videos-not-loading/ for details, but basically xTwitter/Melon messed again with their latest update.

Any word from those in the know yet? Having to use different browsers to see multi-pic posts is really annoying.

Environment:

Thunderbird: 153.0.2esr (64-bit) Operating system: Windows Occurs with multiple email accounts Reproduced on two different computers running the same Thunderbird version

Description:

After updating Thunderbird to version 153.0.2esr, released on 4 August 2026, emails can no longer be dragged and dropped from Thunderbird to the Windows Desktop or any folder in Windows Explorer.

The problem occurs with all tested email accounts and folders. It has been reproduced independently on two different Windows computers using the same Thunderbird version.

Saving an email manually with Ctrl+S works correctly and creates the .eml file. Normal drag-and-drop between folders in Windows Explorer also works. Only dragging an email from Thunderbird to Windows Explorer fails.

The issue also appears to affect third-party applications that use Thunderbird to create or send emails automatically.

Steps to reproduce:

Open Thunderbird 153.0.2esr on Windows. Select an email in any account or folder. Drag the email to the Desktop or another folder in Windows Explorer. Release the mouse button.

Actual result:

The email is not copied or saved to the selected Windows folder.

Expected result:

Thunderbird should export the email as an .eml file in the selected folder.

Additional information:

Ctrl+S successfully saves the same email. The issue affects every tested email account. Thunderbird extensions were disabled, but the problem remained. Thunderbird Troubleshoot Mode did not resolve the issue. Restarting Thunderbird, Windows Explorer and Windows did not resolve it. Thunderbird and Windows Explorer are not running with different elevation levels. The problem was reproduced on a second computer after installing the same Thunderbird version. No relevant error is shown in Thunderbird’s Error Console when the drag-and-drop operation fails. The issue was not present before the recent Thunderbird update.

This appears to be a regression in Thunderbird 153.0.2esr affecting email export through drag-and-drop and possibly Thunderbird’s integration with external applications.

How can I log into my account when Mozilla has locked it? You list no e-mail address, phone number, I have spent alot of time today trying to unlock my account? Why would I want to donate $ to Mozilla, when the customer service is so poor? My account username is [email address]. This is also my e-mail address. I would like to get my account unlocked so I can sync my passwords.

Thanks,

Joe

Hello!

I first installed Video Download Helper several weeks ago and it worked fine. However, since the update of 04 March, 2026, it no longer works with YouTube. (It does, however, still work with Instagram.) Having checked all of the settings (which I had/have not changed), I uninstalled it today and then re-installed it. This hasn't helped. With YouTube, the Downloader icon (pinned to toolbar) simply remains grey and does not show any videos when opened. I am using the latest, fully updated version of Firefox with Windows 10.

Can anyone help, please?

Many thanks,

Stuart.

Hello! Since the latest update to Firefox (153, I believe) my Firefox has not worked. It starts up perfectly fine, but quickly freezes, becomes non-responsive, and needs to be closed. No matter how many times I attempt to open it, the same thing occurs. There’s been been occasions where it hasn’t frozen immediately so I have been able to turn off hardware acceleration as well as remove my theme and disable all my add-ons/extensions, but this has done nothing. Creating a new profile does not help, nor does trying Safe Mode: the same thing happens no matter what. I tried to reinstall the update, but this also did nothing. I haven’t yet tried to uninstall & reinstall or do a Firefox refresh as those are my last resorts and I won’t do them unless I’m sure they’ll make a difference. I haven’t downloaded any new extensions recently, and this only started happening after the most recent update. I’m not sure what else I can try at this point, and am very frustrated.

I found a bug in Thunderbird 153.0.2esr version that wasn't a problem in previous versions. When I drag an email from Thunderbird into a folder in Windows File Explorer (Windows 10 PC), when I drop the email into the folder, I get an error box titled :Error Moving File or Folder", with the contents with a large red X and text "Unspecified error".

The workaround is to right-click the selected email(s) and choose "Save As...".

Anybody else here able to reproduce this and confirm it is a bug?

As of today, Thunderbird will not make contact with my servers and won't download emails. i had been having some issues with Thunderbird not sending emails last week. Plus, Firefox won't connect with my internet provider's website so I cannot access emails thru webmail. Firefox either times out or says connection could not be made. Could there be an issue within account settings?

Firefox is up to date, Windows 11.

I frequently watch BBC videos but approx one week ago, they stopped playing. I have your VPN which is usually off as it give me no advantage, (this appeared following the last update), but I've tried switching on and changing to UK location. No change.

Can you give me some suggestions please?

Under Settings>Privacy/Security>Browsing Data there is no longer the option to Manage Cookies, despite the help section saying that is where to find it. There is no other place in all of Settings to find the list of cookies. There is only the ability to delete all cookies in History, which I have no desire to do. I edit the cookie list weekly, and it is only now, mid August 2026, under Firefox 153 on Win 10 that I no longer have access to them. How do I get it back?

I want to use passkeys while also using Firefox. I read an online article that says this function is considered to be experimental. If so, it seems that it is experimental only with Firefox. I'm able to use them on every other browser I have. Where is the Firefox version that supports them?

Why the h377 did firefox change the screen shot tool by removing it from the address bar AND delete the center search bar, along with changing the location of all my recent web visit from the along the bottom of the screen? This is annoying and unhelpful to pc users, I need these functions back like they were in order to us your site on my pc. I donot and will never use firefox on my phone. If these functions are gone, then I will have leave as well. Either that or remove the update from my pc and cease ALL further updates.

My current version of Firefox is 151.0.4 (64-bit) & for the past 2 weeks or so every time I use the search bar to google something it triggers one of those "We've detected unusual activity from your network" requiring a Captcha. At first I tried all of the typical stuff [antivirus, vpn, extensions, etc...] to make sure that wasn't the issue. But as of yesterday & confirmed today I can actually go to Google's website first & do the search from there with no issue & no captcha.

So, whatever the issue is has to do specifically with doing the search via the search bar... for some reason. Is this a bug in the browser, or is there perhaps some setting that could cause this to happen in the about:config page? Though, I doubt a setting could be it because I've changed the settings I've changed now for years without causing this issue.

Just recently I changed my privacy settings to take advantage of the privacy opt-out option for websites not to share my data or information. I went to my AMX credit card account and now every time I move to a new page the message, "Your Global Privacy Control opt-out signal has been honored" pops up and gets in the way of the information on the page. I am constantly having to click on the X in the corner to close the message box. Once would be enough for each main website. Having it pop up every time is absolutely annoying. I like having this option but if it's going to make me have to close the informational box every time I move to a new page or back to a former page, then I will have to undo the choice. The web designer who put this message text into the Firefox browser needs to find a way to only have it pop up once if they feel it is really necessary to tell me that they are blocking information from other companies. I really don't even need the first message just as long as it works behind the scenes. I hope someone gets web support to look into this issue. It's just so annoying.

Every since updating to Thunderbird 147.0.1, I have noticed that every time I start Thunderbird, it creates a directory called "Thunderbird" in my home directory! This didn't happen before the update and I have a '.thunderbird' directory in my home already! I had a search in the settings for the term "directory" but did not find anything that seemed related. But it seems to be caused by some new setting that has become activated with the update.

I am on an Arch GNU/Linux operating system, if any further information is necessary to help debug this, please let me know. Thanks a lot in advance :-).