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Thunderbird won’t open because it wants a Primary Password which I have never had to do. I went on another computer (the one that I am currently using) and generated a password for Mozilla. I tried that but it still would not open. I have restarted the computer 3 times. When it asks for the pass word, I have entered the new one for Mozilla with no success. I have tried the one for the main opening of the computer with no success. When I close the small window that asks for the Primary Password, the spinning beach ball of death shows up and eventually (maybe 10 minutes) it has to be forced to quit.

I like to know what is the problem at my e-mail setting? Since two weeks ago, when I sent a message, receiver could get my message, but there were no sent record in my Sent Message box.

This morning Thunderbird asked me to update which I duly did. Once done all messages started disappearing from inbox. Eventually I found them and moved them back to inbox only for it to happen again

Have now tried 3 times, same result, every single email from Inbox keeps being moved to deleted in Local Folders

All new emails that have come in since appear for a micro second in Inbox before being moved to Deleted

This is obviously not a great situation to put it mildly and as it has never happened before and started straight after this morning's update I can only assume that the update is to blame

Any help would be greatly appreciated

Brenton, GPS Imports Team

I just got a new Mac laptop and I again chose Firefox as my default browser. I used to have a series small tabs of frequently accessed websites at the top of the firefox home page...like my google email, Amazon, etc. I tried to do that again, only now I end up with a whole series of websites and bookmarks all across the top of the page : Yahoo, Bing, Wikipedia, Twitter, etc,. etc. I want to get rid of this lineup and I'd like to be able to add my personal email, and a few other frequently visited websites. I thought that these small tabs at the top of the page were called shortcuts - but after turning the toggle on an off in firefox settings and not changing a thing - I don't know what they are or how to delete what's there and get my person tabs back. Please help.

For some reason, my Gmail page doesn't show the icons on top at all. Like the archive, mark as read, and the others on top of the mailbox contents. They show up on both Chrome and Edge, so this seems to be a Firefox problem.

Computer being used with issue: HP ProDesk 600 G2 DM (Windows 10, 16GB RAM) So can this be fixed or should I just use my phone for Gmail?

Error "No video with supported format and MIME type found" when trying to play video in many third-party players in FireFox Nightly. There is no such error in Firefox/Beta; everything works normally. What should I do? I don't want to switch to Firefox; it doesn't have about:config. And in Firefox Beta, there are no options "Enable Isolated Processes with Zygote Preloading (requires restart)" and "Enable Isolated Content Process (requires restart)", which prevent tabs from being loaded in the background. Nightly updates don't help.

I had an email in my hotmail spam folder. I moved it to the inbox and it disappeared! Possible causes of a problem 1. The email came from a private email domain eg info@companyname.com. It is a small company which uses outlook, a previous email also ended up in my spam even though it is genuine, (And I know from experience that kind of email address can cause problems in my setup) 2. Both emails had an attachment - the first one I moved using thunderbird desktop, not android, directly to the inbox of another email account with no problem. 3. All email to my hotmail automatically gets forwarded onto a gmail account (not leaving a copy in hotmail). However if I mark an email as not spam/move to inbox in thunderbird (desktop) it doesn't get forwarded on, stays in the hotmail inbox.

I have just moved another message (telling me I'd signed in here) from my spam to inbox using thunderbird android and it has appeared in my hotmail inbox - so I suspect the attachment might be the issue?

Any advice of how I can get it back? (and also what exactly caused the issue) I have searched both email accounts (including trash and spam and all mail) and it isn't appearing anywhere... searched/looked in thunderbird desktop and both email accounts online and it has gone ... Thanks

My thunderbird would not open. Said the file location couldn’t be found. I read online it recommended that I uninstall the application and reinstall. This fixed my issue with being able to access thunderbird but during the install all of my local folders were removed. Is there anyway I can get these back? I also lost all of my address book contacts.

The Smart Window feature caused CPU usage and memory to max out. Disabled it as soon as I could find the setting to do so (Settings/AI Controls and BLOCK "Smart Window") and overload disappeared immediately. Everything is working fine now. What a disaster! Also did not find the interface terribly impressive or informative. Quite the opposite: It was almost deliberately vague and not at all intuitive.

Contrary to the claim that "Smart Window automatically groups related tabs, so everything has its place and what you need is easy to find" it just just described each of my open tabs (despite several related tabs being right next to each other) instead of supposedly grouping them by subject matter. That's basically useless -- I can see that for myself. Definitely not ready for Primetime.

Windows 10 Home, Firefox Version 155.0.1 (64-bit), Dell Inspiron 15 3000, installed RAM 8.00 GB, Storage 119 GB

Yes, I've been contemplating adding memory and/or buying a new laptop. But a new feature shouldn't totally freak out my system without some sort of appropriate warning about memory prerequisites, etc.

9.6.2026. Spoke with Spectrum, my carrier, to ensure email protocols were correct. They checked from their end and the problem is with Thunderbird protocols. There is no rhyme or reason to incoming emails. Sometimes they have their content but days have gone by where only the subject line/date/time stamp shows. What is going on???

How can I specify which Thunderbird account is used when MAILTO is used in html? I know I can change the account to what I want after the new message window comes up but I always forget.

Hello,

I have been unable to update Firefox past 132.0.2; every time I download an update and install/restart, all tabs automatically crash upon loading regardless of the website. I can load local pages like settings or about:config, but anything that actually uses the internet goes straight to crashing (including sites as simple as google.com). I have tried restarting in Troubleshooting mode to no avail. There are no crash reports when I pull up about:crashes, so unable to post IDs here.

It is not an internet access problem (I am [unfortunately] filling out this form from Edge), and with reversion to 132.0.2 everything moves along hunky-dory. I am also able to use the newest version of Firefox on all of my work devices, so it appears to be something in particular with my person PC. Problem occurred with both Windows 10 and Windows 11.

Any help would be much appreciated- I didn't mind an older version of Firefox that worked, but there have been some MFA logons that refuse to go load in v132 so it's becoming something I'm less able to ignore now. TIA

I've noticed that Mozilla products (firefox, thunderbird etc) all phone home all the time, which is a violation of both my security as well as privacy policy. In the firewall one can observe persistent, periodic, repeated connections to various non-sanctioned sites and services, apparently run by Mozilla. These include, but are not limited to:

• .mozgcp.net
• .services.mozilla.net

firefox-portal-detection.com etc.

Specifically, there are persistent, periodic and repeated connection attempts to (just copy/pasting from the first page of firewall report; there are many more as well as similar connection attempts from thunderbird as well): firefox-settings-attachments.cdn.mozilla.net:443 assets-prod.sumo.prod.webservices.mozgcp.net:443 content-signature-2.cdn.mozilla.net:443 push.services.mozilla.com:443 etc

These begin at the startup of the browser/mua and continue throughout the session. Given that none of the sites actually browsed have anything to do with mozilla per se, and given that various privacy-violating features such as DNS-over-HTTPS (yes, that's a not a privacy-enhancing feature but the opposite - it just shifts the surveillance point from the ISP to the DoH provider) and other similar "features" are disabled in-browser, there should be no user/browser connections attempted to mozilla servers.

Also, by setting up a local security MITM proxy in order to observe and analyze the content sent to and received from these services and configuring the browser to connect via the proxy, the browser seems to *stop* trying to connect to these services, which indicates *active* measures by the browser/mua to avoid it's browser-fingerprinting and location-revealing content from being intercepted and analyzed.

This is especially concerning as Mozilla actively brands and markets it's products as privacy-respecting, as for-user-rights and as away-from-big-tech-dominated. Consequently I perceive this as complete breach of trust. Even by just *attempting* such phone-home connections a leak of metadata occurs, identifying the IP, the browser and consequently the user and user's location, sometimes actively (such as was the case with now apparently discontinued location.services.mozilla.net). Combined with whatever content these connections carry, this constitutes a serious breach. And there seems to be no way for the user to configure the browser to stop making these connections, other than by using an external application firewall.

And to top it off, with Firefox version 155.0.1, the browser now outright refuses to connect to *any* sites at all if firefox.settings.services.mozilla.com:443, firefox-settings-attachments.cdn.mozilla.net:443, firefox-portal-detection.com:80 and content-signature-2.cdn.mozilla.net:443 are *externally* blocked, at least on that profile (which worked just fine prior to upgrade to 155.0.1), showing a spinner and waiting indefinitely (not even timing out). These are the *only* connections it even attempts, completely ignoring the actual site that it was told to connect to. So that's at least 4 privacy-violating, security-policy-violating phoning-home connection attempts and a complete disregard for user's actual, sanctioned connection request.

How do I remove "add sitename"* from Search bar drop-down menu?

• sitename refers to whatever site you are on at the time

I have no use for this option and find it overly invasive. I have searched everywhere for solutions and have not found any that work. If it is not currently "removable", please make it so.

Thanks

Thunderbird not connecting to server. It says timds out and an error occurred connecting to mobile.charter.net. I can neither send or receive emails. This started 8/20/2026

Hello

I use Thunderbird (153.2 0esr) on a win 11 PC.

I have some POP email accounts with btinternet which work.

I want to change. them to IMAP accounts using the same email addresses.

Before I do this I have several minor problems within Thunderbird, which I would like to sort out before copying the Thunderbird files as a backup.

Rather than list them all, it's possible that fixing the first may solve others.

When I open Thunderbird I see this message... see FIRSTCalendar if it hasn't been inserted into the text

I have never (knowingly) used BT's calendar. Clicking cancel removes the report and does not stop any of the BT mail accounts working.

I tried using the username and password of the default account but password of the default account without success. At a later stage this appears...

See SECONDcontacts if not inserted here

The address displayed is one that I have deleted from my BT Email account.

It is no longer shown as one of my BT accounts in the email management page in MYBT or in Thunderbird

Again, clicking Cancel does not stop my BT email accounts working.

Any suggestions how to fix this, would be welcome.

Cheers

Dave