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I am using firefox on linux since ~10 years. Currently running latest FF on Kubuntu. I always had setting set to forget all cookies and session details except of search history on exit.

Since approx 2-3 weeks (latest update?) those settings don't work. FF remembers everything regardless of settings I chose.

Does anyone have idea why this is happening now and how to fix it?

Hello. Impossible to connect to an existing Google account. Neither to the "full" account, nor to the Contact list nor to a Calendar of an existing account. Neither to a "private" account, not to a "workspace".

When trying to connect to a Contact list, after the Oauth window and the authorisation to share data from Google accounts, the app answer "Connexion impossible" (I am a French user).

When trying to connect to Calendars, Google's window asking authorisation to share data comes back after clicking "authorise".

I'm concerned I've got my Junk set up so that TB is not actually learning what is spam, plus spam is not easy to delete.

First question. What is putting [SPAM] in headers before emails arrive? Is it SpamAssassin? I use my own website/email address and my host uses Spam Assassin. My host in addition has their own native Bayesian spam, but that would use *****SPAM***** headers and I never get these.

The problem is this. Most junk arrives marked [SPAM] but doesn't go in the Junk folder, which is the only folder with one-click Empty Junk. So I have filters set up to direct headers with [SPAM] in into the Junk folder.

(i) the [SPAM] arrives in the Junk folder not marked as Junk even though the filters are carefully set up to "Set Junk status to: Junk"

(ii) it doesn't seem possible to bulk mark the contents of the Junk folder as Junk. If I click the flame icon in the header row once, then all the flame icons are switched to not-Junk as expected. But if I click it again then only some, not all, are changed back to Junk. IE completely different from normal all-off/all-on conventions.

(ii) some [SPAM] ends up in the Spam folder despite the filters. This looks like pure filter failure.

The goal is the get all the [SPAM] messages in the Junk folder along with the Junk the TB itself puts there, so (a) I can delete them with a single click plus (b) all marked as Junk so the TB is learning from the [SPAM] emails.

How can I do that please? What am I doing wrong?

Many thanks.

I’d like to request a feature for Mozilla Thunderbird on Ubuntu/Linux:

A native system tray (AppIndicator) integration with the ability to: • Run in the background without keeping a window open • Minimize to tray instead of the taskbar/dock • Option to start minimized to tray on system startup • Show unread mail count directly in the tray icon

Right now, users rely on third-party tools like Birdtray, which work but feel like a workaround rather than a seamless experience. A built-in solution would improve usability significantly especially for those who prefer a clean desktop while keeping Thunderbird always running in the background. I think this feature would bring Thunderbird closer to the behavior users expect from modern messaging/email clients on Linux desktops. Would love to see this considered in future updates!

Hello,

i used the new feature to add my icloud calenders to thunderbird. that works fine. But the existing icloud Birthday calender was not separately choosable and dose not appear in thunderbird. what do do? Thank you!!

Best Simon

Dear all,

When receiving signed AND encrypted mails from an Outlook-account I get the exclamation sign for the signature.

The message is (German) : "Digitale Signatur ist ungültig Diese Nachricht enthält eine digitale Signatur, die aber ungültig ist. Die Nachricht wurde mit einer Verschlüsselungsstärke signiert, die von dieser Version Ihrer Software nicht unterstützt wird. Signiert von...."

I already did all standard checks (trusted, new hash algorithm and so on),

Now I would like to know the EXACT reason why Thunderbird is not accepting the digital signature. How can I accomplish this?

THX in advance and best regards!

Question: the homepage shows the number of blocked trackers and a SHARE button. To Whom one should share this information with? Mozilla? What is intent of this SHARE feature? The reporting of trackers to websites, as to remove them from their websites? Like the idea of this feature, but not sure what the actual purpose is for? No reference information to SHARE usage inside the app?

Thx, JMH :)

A few months ago I installed Thunderbird onto a new PC having previously used it on a previous PC (so I'm not a newbie).. However I'm seeing a persistent issue that I never saw before...

I've a regular contact whose name I won't specify but let's call him Roger Smith. What happens is that whenever I post something on a forum (such as this one) and somebody replies, the replies look as if they came from Roger Smith - even though he's got no connection with the actual forum.

It doesn't happen with every forum - for example it doesn't happen with this one - but it does affect most of them. Has anyone else ever reported this and is there anything I can do to correct it?

いつもお世話になってます。

機種：POCO F6 Pro、POCO X7 OS：両方 HyperOS 3.0 ホームページ：https://rakuten.dropgame.jp/drop/play/top （https://pointmall.rakuten.co.jp/　からゲームで貯めるをクリックしてぷくぷくラグーンを押してスタートで画面に入れます。）

Androidアプリでホームページのゲームを表示する時に画面が15～20秒間 真っ白になったり真っ黒になったりします。 その間操作はできません。

よろしくお願い致します。

I tried to send an email to 12 recients and got a message "to many recipents"; I tried just onerecipient and got the same message. I went to my provider Iprimus' webmail and all was sent.

I had to restart my Mac. When TB restarted during relaunch of the Mac, it was like TB starting fresh. It didn't display my email accounts, or my folders with saved emails, etc.

I quit TB and looked for it in my Applications folder - and I found two versions of TB. Inside the Thunderbird folder was version 140.9.0esr. Outside the Thunderbird folder was version 150.0. See attached screen grab.

I thought I should try launching the newer version (which was outside the folder). So I moved the 140.9.0 version to the trash, then launched the newer version – and it had the same problem. It looked like I was starting TB from scratch.

Next I quit TB (the newer version) and moved the older version out of the trash and back into the TB folder and double-clicked on it. A dialog box popped up saying that the file is damaged and can't be launched.

So I tried launching the newer version again, and it still looks like starting from scratch.

I really hope somebody can help me solve this. I can't access any of my email accounts or any of my stored emails. I use email for work (as most of us do), so this is crippling me.

Thanks in advance for any help.

What is an easy to use anti-spam program for Thunderbird that will allow me to easily mark new messages "block sender" or "block domain?" My e-mail host InMotion and their Spam Assassin does not support quick and easy marking of new messages.

As of April 4 midnight my yahoo account in Thunderbird just stopped receiving incoming pop messages nor can I send. According to Yahoo, it showed that Thunderbird had access. Thunderbird showed how many new messages to download, but then does nothing but hang and time out. I have removed all stored yahoo passwords; I have removed yahoo permissions in yahoo in order to start over. I get the normal log in screens to add permission with oauth2, signed into yahoo account in yahoo and it shows thunderbird has access, yet Thunderbird still can NOT access yahoo mail (download pop or send smpt). YES MY SETTINGS are correct. They haven;t change since before April 4 midnight. I need this account active again. HELP!!! email to X@hotmail.com with Yahoo in the subject line: According to THunderbird, I have version 140.9 esr. when I press check for updates it says I'm up to date. Although the yahoo help page says as of March 2026 version 148. confused. Bill

(PII redacted by moderator)

I have been using Thunderbird for my email X@plethora.net since 2004. My son set it up. Now I have two additional emails, @mail. com, and I desperately need to be able to read them somewhere with a usable interface. One I had been reading in Apple's Mail app (also for many years, but Google locked me out of both of them on April 10. I have the emails back,, and it has screwed up everything else. I don't want to be stuck forever with https://mail.google.com/mail/u/0/#inbox and https://mail.google.com/mail/u/1/?pli=1#inbox.

I have a MacBook, from 2021 or 22, which needs to be updated

X@plethora.net has one open window, Thunderbird's inbox, and several tabs. Can I open a separate window for Y@gmail.com? I don't think I need to transfer the existing messages.

My iPhone is X, I have an Apple keychain, with a passkey. I wouldn't mind phone calls or texts, but if I'm on a call, I don't know how to switch away (to receive a text) and then get back to the call.

(PII redacted by moderator)

When bulk selecting and deleting, sometime columns don't match rows. eg: subject doesn't match correspondents (sometime additional random contacts are added to correct correspondant) and message panel may not match highlighted "subject" email.

Been using for years...love the product. But this is a new quirk. I have noticed, when I have done hundreds of bulk deletions, deleted messages will be added back in inbox??

Thanks, Dave Millert, X@aol.com.

(PII redacted by moderator)

First, let me describe the configuration I have been using successfully for two decades -

I am on the latest release channel release with a POP3 configuration.

I keep the message store on my file server and have Tbird installed on it and my laptop. The file server is a Win 11 machine as is my laptop. Each machine points to the message store (including the config file) on the file server.

Of late, every time I try to use Tbird on the file server, I get "You have launched an older version" message. So far reinstalling and pointing to the existing message store works.

But I am getting bored with having to reinstall every time, and I suspect this will eventually break completely.

Is there a way to stabilize this?

Thanks Jonathan