I-Thunderbird Community Forum

After receiving a message to an email address, for which I have configured an auto-responder using the "Reply to Template" filter, I get the following message in the error console:

``` sendRemoveListener on closed conduit {8821E3B3-E8FB-40E2-95E9-EC40294818C4}.126 ConduitsChild.sys.mjs:122:13

   _send resource://gre/modules/ConduitsChild.sys.mjs:122
   removeListener resource://gre/modules/ExtensionChild.sys.mjs:715
   removeListener resource://gre/modules/ExtensionChild.sys.mjs:971
   register chrome://extensions/content/child/ext-storage.js:185
   removeListener resource://gre/modules/ExtensionCommon.sys.mjs:2956
   revoke resource://gre/modules/ExtensionCommon.sys.mjs:2978
   close resource://gre/modules/ExtensionCommon.sys.mjs:2983
   unload resource://gre/modules/ExtensionCommon.sys.mjs:978
   close resource://gre/modules/ExtensionContent.sys.mjs:1171
   destroyed resource://gre/modules/ExtensionContent.sys.mjs:1253
   observe resource://gre/modules/ExtensionContent.sys.mjs:1276
   onEditFilter chrome://messenger/content/FilterListDialog.js:415
   onFilterDoubleClick chrome://messenger/content/FilterListDialog.js:1005

```

Template message is saved in the same account the incoming email is sent to.

Any ideas ... ?

Hi,

I've started experimenting with Vibecoding some extensions for myself.. But I keep hitting a problem where TB reports back that folders are stale.

Specifically I'll hit something like this:

[Exception... "Component returned failure code: 0x80550005 (NS_MSG_ERROR_FOLDER_SUMMARY_OUT_OF_DATE) [nsIMsgFolder.messages]" nsresult: "0x80550005 (NS_MSG_ERROR_FOLDER_SUMMARY_OUT_OF_DATE)" location: "JS frame :: resource:///modules/ExtensionMessages.sys.mjs :: getMessagesInFolder :: line 925" data: no] ExtensionMessages.sys.mjs:928:13 [Exception... "Component returned failure code: 0x80550005

Usually when I go look at these folders in the UI, the total-email-count for the folder in blank, but the Size of the folder will show >1kb (eg .. something greater than zero). If I click on the folder, TB updates the summary file and all is well, for a while.

Some folders do report as no messages, and "blank" for file size as well.. but those seem to be genuinely empty.

These types of issues are causing pain in several extension ideas I've had, and I can't seem to figure out a way to handle them.

For example: I had an idea to create and extension to delete empty folders. The original version would encounter these NS_MSG_ERROR_FOLDER_SUMMARY_OUT_OF_DATE folders, and then just wipe them out as TB told the extension there were no emails in it. I found this out a little too late for some folders..

Another idea was to create and manage Virtual Search folders automatically. But I've hit a similar issue there with this staleness and had to skip such folders.

I've tried to get the extensions to trigger rebuilding summary files when we hit this error, but that never seems to do the job. The only method I've found is to open the folder manually in TB. Sometimes I'll find that starting a Search across the folders also helps - but that also tends to bail out unexplained.

I'm working with a lot of emails and folders..

If anyone can help explain why TB "forgets" whats in a folder, and how to trigger a summary-rebuild for a specific folder I'd be interested in hearing it.

Thanks

I'm running Thunderbird 157 64bit for Google email, Calendar & Tasks. This has worked nicely for months even after the upgrade to 157. Today Calendar & Tasks fail to connect and are completely blank. Apparently the Add-on 128.5.12 (Philipp Kewisch) that made this work has been disabled for some reason. Please don't tell me that Thunderbird has suddenly decided Google Calendar and Tasks just aren't needed by anyone anymore. There is no new connector available that I can find, just a suggestion to go back to an older version of Thunderbird? Please help me understand. Thanks!

Ihave installed and configured Google-4-TBSync addon to synchronise contacts between Google and Thunderbird and all works fine.

Just got an email from Google entitled "[Action Required] Mark AI agent OAuth clients as agentic for Google Workspace MCP by Nov 11, 2026"

Does anyone know if that is sometyhing I need to do for the addon to carry on working?

Thanks

This is answering Toad Hall and Mapenzi, who discussed my problem with the disappearance of the opportunity to put a copy of a message into a specific folder.

This facility was (and is) available on my MacBook, running TB 113. It has disappeared in this version (153). After a long time preoccupied with too many other things, I have now looked at my Add-ons lists in both versions. See attached screen shots. I think this explains my problem. But it doesn't *solve* it, as there is no suitable Add-on available. Perhaps, Mapenzi, you could ask your mate if he's willing to update the Add-on?

Mapenzi: it looked as though your screen shot of a blank message (in French) included an option for 'Copie à'. Is this standard in French HTML? (I can't persuade my TB to compose am HTML message to check, at the moment.)

Je vois que 'Mapenzi' est un mot Swahili pour 'amour'. Vrai?

Just updated to Thunderbird 157 and all my calendars are now disabled because the google calendar add-on is not compatible and was disabled. How do I enable my other calendars or move back to 156 while I wait for an update for the google calendar add-on?

I really hope somebody can help me with the "Google-4-TbSync is incompatible with Thunderbird 153.3.1" Are there any solution to this, because the developer seems to have stopped the development of an update of this extention. I desperately need to sync my Google contacts with my Thunderbir contacts. Any help will be welcomed.

I've developed a thunderbird add on. Now I need an extension ID I've read https://extensionworkshop.com/documentation/develop/extensions-and-the-add-on-id/

So how do I get an extension ID?

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.

So, I recently updated Thunderbird and I appear to have lost the Spell check as you type feature. By 'doesn't work' I mean; The incorrectly spelled word is underlined, but a right click shows; No Spelling Suggestion (which kind of suggested the feature can't find or isn't reading the dictionary)

I have done multiple things to try to get it to work.

I have checked I have the English Language Pack installed in Add-ons> Language I have check I have an English dictionary installed in Add-ons > Dictionary. (I have uninstalled the above and re-installed them too, including, shutting down Thunderbird in between)

I have unchecked the "Enable spell check as you type" in Settings > Composition, restarted Thunderbird and then re-checked it.

Quite by chance, while I was typing this, I added an Add-on called "Easy Table Editor by Cardella" And whilst testing it, I noticed the Spell Check as you Type worked in the Pop-up window and continued to work inside the inserted table in the compose window. NOTE: Text outside the table, still does NOT work.

Whilst playing around, I also used a Text Highlighter tool (TextMarker) and amazingly, text that has been highlighted, also seems to work with Spell Check as you Type.

I then deleted everything (Ctrl A) Delete. And any text I type, now responds correctly to the Spell Check as you Type.

So, something in the thml code seems to be disrupting the code?

I deleted this line and it works

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 :)