Thunderbird Community Forum

For a long time I've been using ublock origin to block parts of emails and RSS feeds to make them more readable. This is not so much to block ads as to block parts that make it hard for me to read things. I am partially sighted. Flashing text etc. is very hard for me.

Now the extension loads but the element hiding part doesn't work on either emails or RSS feeds. I click on it but it no longer selects any part of the emails or feeds.

Why is this and what other options are there?

It still works on Firefox.

Since yesterday (15 September 2026), my Microsoft Account has not been working properly. I managed to get round the problem by deleting my cookies. Then the update to version 156 was released, and after that Eule became incompatible. When can we expect an update to make it work again? Thanks.

This afternoon, without any warning, all my mail in every folder could not be displayed. This is the second time this has happened in the last month and a half. I have two mail accounts - one that goes through Yahoo and the other Gmail. No mail is displayed in either account.

When I run Thunderbird in troubleshooting mode, the mail does display. I then disabled the few addons that I use but that didn't make any difference. When not in troubleshooting mode, no mail is displayed.

Of course, there's "troubleshooting information" but that's way too technical for me to get anything out of it.

I've been a Thunderbird user for over 20 years and I would like to keep using it but this performance is discouraging.

What do I need to do to get past this issue? I'm assuming I'll be able to read an email response by using troubleshooting mode.

Thanks.

Somewhat frustrating ... just after installing and setting up CardBook for Thunderbird on all devices... it automatically deactivated and "disappeared". CardBook no longer is compatible with Thunderbird.

Hope there will be an update soon that allows to keep all the settings...

Thanks.

With Thunderbird 155 our Shortcuts deletion plugin doesn't work anymore.

Now all the worst shortcuts like "a" are back. 

(I never understood why it isn't something like "Alt+A" )

We need to deactivate all the *(/&%$&% shortcuts. We deactivated them via a plugin. But the plugin does't work with 155. Does someone knew what mozilla chaged with the shortcuts handling, so we can change our plugin acordingly?

I'm thinking about using the LanguageTooler grammar checker that's listed among Thunderbird's add-ons but I've seen reports on Reddit saying that it's only FOC for a limited time, after which you need to stump up a monthly fee,

Does anyone know of a cheaper alternative?

Hi I can not access and install addons.

https://addons.thunderbird.net/de/thunderbird/

Cloudflare seem to work?!

Tested with my phone as well (cellular connection)

Is this a general issue and did they notice it already?

Best regards :)

// Listening for the extension to trigger (e.g., via a custom command or button) async function forwardConversation(tabId, msgs) {

 let body = await exportConversationAsHtml(msgs);
 let displayedMsgs = await browser.messageDisplay.getDisplayedMessages(tabId);
 let identityId = undefined;

 if (displayedMsgs.length) {
   let accountId = displayedMsgs[0].folder.accountId;
   let account = await browser.accounts.get(accountId);
   identityId = account.identities[0]?.id;
 }

 await browser.compose.beginNew({
   identityId,
   isPlainText: false,
   body,
 });

}

async function exportConversationAsHtml(msgs) {

 let html = `
Forwarded Conversation:
` + hr;
  
  let promises = msgs.map(msg => exportMsgAsHtml(msg));
  let messagesHtml = await Promise.all(promises);
  
  html += `
` + messagesHtml.join(hr) + `
`;
 return html;

}

async function exportMsgAsHtml(msg) {

 // Simple fallback to extract text content safely

}

I used to use Foxmail as my email client. When writing emails with oversized images, I could right-click the image and select the "Auto resize it to proper size" option to make the image easier to read. However, I can't find the same function in Thunderbird. Do I need to use an extension, or is there another way? Can someone please help me? It's really frustrating.

I updated to TB154 recently and find that connection to my Outlook calendar via Owl no longer works. In past updates I have been able to turn Owl off and then on again, sign in to Outlook and all is good. This time I was told that I had to unsubscribe from the calendar and then re-subscribe. Unfortunately, nothing that I am trying (sharing, publishing & etc.) is working. I remember that the properties window showed the calendar location as owl:// but everything that I have tried to add after this doesn't work either. Thanks for your assistance.

I use a number of add-ons to help me out. Unfortunately, the following add-ons aren't working right now: Quicktext, Send Later, TbSync (where and how do I integrate it into Thunderbird?). When sending an email, I have to go through “File” > “Send”—there’s no button for it. The VBA call to send a generated email truncates the string, so the attachment isn’t included.

I’m sure some add-ons will be updated. But this is hitting me hard right now.

ThunderBird upgraded to v153.0. Since then EAS and TBSync have stopped working. Extension Manager have disabled them and report both are incompatible with TB v153.0.

The option to "Find an alternative add-on" for both fails to find an alternative version to work with TB v153.0

Are newer version of EAS and TBSynce imminent?

Bill

The default font I have been using in replying to messages used to be in the same as what was designated in the Composition settings. Now, with the EnhancedReplyHeaders extension, the default font is always "Variable Width," no matter what I do with the Composition settings. What do I need to do, to have the default Reply font be the same as that specified in the Composition settings? Thanks,

- Alan

I recently upgraded to 140.12.1. When I attempt to run the Remove Duplicate add on it hangs.

I suspect this is something to do with an additional menu item that now lists under Remove Duplicates Saying "Set original message folder(s) for next duplicate search". However when I select this, I get an error message from Remove Duplicates saying "Invalid choice of original message folders."

I have no idea where to set the folders, nor what to set them to..Can anyone help - it's an excellent add on which I use a lot.

Hello,

After updating Thunderbird to version 153.0.1 ESR (64-bit), the InsertSignature button changed its position.

Before the update, the "Insert Signature" button was displayed near the message formatting toolbar, next to the "Body Text" selector.

After the update, the button moved to the top compose toolbar next to the Send button.

My environment:

- Thunderbird 153.0.1 ESR (64-bit) - Windows 11 - InsertSignature 0.4.5 - Quicktext 6.9.1

InsertSignature has not been updated recently (version 0.4.5), and this change appeared only after Thunderbird was updated.

The button used to be located immediately next to the "Body Text" selector in the formatting toolbar. Last Friday everything worked normally. Today (Monday) the button position changed.

Is this an intended UI change in Thunderbird 153, or is it a compatibility issue or bug?

If possible, is there any way to restore the button to its previous location near the formatting toolbar?

Thank you very much.