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I keep getting a large box saying sign into your gmail account using Mozilla Thunderbird, but another box comes up saying error 400 unable to do anything; and the first box keeps reappearing on the screen. My password hasn't changed and I am unable to access gmail. It seems like a corruption between Gmail and Mozilla Thunderbird

I am signed in on all my devices. Yet nothing has synced since October 2025. So none of the books marks from my laptop display on my desktop in bookmark folder. The folders don't even match what is on my laptop. How do I fix and how do I prevent in the future?

The latest versions of Firefox (and Tor) are still fixed and work successfully in Windows 7, and this is still relevant.

After all, the Firefox team can also release updated versions, right?

https://github.com/Blaukovitch/Mozilla_Firefox_Windows_7/releases

Thunderbird 143.0.1 eclipse.

Quite recently I noticed that, in the list of folders, I see 2 "Junk" folders.

On looking at the properties for 1 Junk folder the location is shown as "imap://*********%40gmail.com@imap.gmail.com/Junk",

but properties for the other shown as Junk locates as "imap://*********%40gmail.com@imap.gmail.com/Spam".

I've tried renaming that folder in Thunderbird to Spam but the change doesn't take effect.

What went wrong, and more importantly how can I rename it to see it as "Spam"?

tnx.

Mit meinem e-Mail Konto .gmx.de kann ich keine eingegangenen Mails mehr weiterleiten und auch keine neuen Nachrichten mehr versenden. Nach dem Betätigen "Senden" kommt immer der Hinweis "Postausgangsserver SMTP kann nicht authentifiziert werden.Überürüfe Passwort und gewählte Authentifiziermethode unter Kontoeistellungen " .Ich habe aber nichts verändert und weiß nicht was ich in Einstellungen überprüfen soll oder ändern soll.

I inadvertently deleted a mail sub folder named Shopping Oder Confirmations I found the folder in my acronis backup and copied it to my desktop I then pasted it in to the profile window of thunderbird in hopes that when i restarted it would show up in my mail folders which it did not I can send you screen shots of the different windows where I dropped the folder Can you help please?! There is tons of information in these folders I reference often. Thank you! BTW I did just make a donation :)

I have Norton 360. I just reinstalled a brother printer and now I get the "Your browser is being managed by your organization". While I sync with my laptop, as others have said, I'm not an organization. There is an Enterprise policy .

Active Policy Name Policy Value ExtensionSettings {"firefoxhpsureclicksecurebrowsing@bromium.com":{"installation_mode":"blocked"},"firefoxhpwolfsecurityextension@bromium.com":{"install_url":"https://addons.bromium-online.com/wsx.xpi","installation_mode":"normal_installed"}}

I can't store or edit any bookmarks. How do I correct this? I need answers in very simple terms as I am very much a layman with computers. Thank You!

I am unable to log into RBS site on Firefox but I can on Chrome and Edge. What's the problem and how do I fix it? This has only happened in the last couple of days.

The title says it all. I use Firefox on my home computer with Windows 10, and my work laptop using Windows 11. At home, URLs do not autocomplete when typing them in--settings are all on for this to work properly, and it used to work properly, but it does not work at all. At work, URLs complete just fine.

Hi, I have googled this and been into the Thunderbird Help section and cannot find an answer. I am having trouble with one of my email accounts, I want to delete it and it and reinstall it. I get to the point in the process where it says to click on Remove Or Remove account but there is no tab or button that is visible to do this. Help here would be greatly appreciated. Regards Mark

I set up my new tab (after the Home page which was Google News for my profile) to show shortcuts in four rows. Clicking on these shortcuts opened the URL for an account or webpage. I "pinned" or "dismissed' these shortcuts over time. Somehow, I lost every shortcut and cannot seem to figure out how to recreate this.

Hello, My firefox app stoped working today(version for androids). I uninstalled it and installed it twice but it still won't work. When I open it, it stops working after a few seconds and I recive a notification that it crashed. What should I do?

When I charge what is supposed to be Thunderbird 115.18 for mac os 15.10.7 on the site of all the versions, I only get Thunderbird 147 for mac and it doesn't work correctly as my messages desappear. Where can I really find the dmg I need that is to say: Thunderbird 115.18 for mac (and not the 147).

Many months ago I reported this error/bug but it remains unresolved, even though it was supposedly progressed to Mozilla.

I have a desktop PC & a laptop. The problem only occurs on the laptop. I am running T/bird on ESR channel on both machines.

On the laptop, even though the settings are not to update automatically it does, reverting to the release channel. This displays the following bug!

Instead of a "Junk" and a "Spam" fold I get 2 "Spam" folders, but a closer look shows the paths as being correct, what you would expect. The folder will not rename.

Reinstalling the ESR version restores the correct folder names - UNTIL THE NEXT TIME THE PROGRAM AUTO-UPDATES when it shouldn't!