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Hello,

I'm new to thunderbird and i'd like to customize the layouts. I increased the width of the spacesbar by messing with the userChrome.css. however now it is overlapping on the other panels... I managed to fix it on the mail panel, but not the others. (see attached) can you help me find the proper CSS property?

thanks you.

bold text Hi, I have Yahoo mail and Thunderbird. I want to use TB as my main mail but still keep my Yahoo account as the data is stored by yahoo and I suspect I will loose my history if I cancel..

I leave my email and a couple of other tabs open when I shut down. I cannot make TB appear as a tab, it always opens full page.

Any ideas?

Von der Erstinstallation war ich gewohnt, dass von oben nach unten die Darstellung der Ordner wie folgt war: Posteingang / Entwurf / Gesendet / Archiv / Spam / Papierkorb / Local Folders /Postausgang / Unbekannt Nach der neuen Installation, die erforderlich war (Rechnerneuinstallation) ergab sich folgendes Bild von oben... Lokale Ordner / Papierkorb / Local Folders und dann alle meine selbst erstellten Ordner am Ende dieser Aufstellung kam die Zeile mit meiner web-Adresse xxxx.xx@web.de dann Posteingang usw. siehe oben aufgeführt Damit liegt der Posteingang am Ende meiner Ordner Auflistung und das ist über den unteren Monitorausschnitt hinaus, diese Situation ist für mich untragbar und deshalb werde ich wohl auf ein anderes e-mail Verwaltungsmedium umsteigen müssen. Eine Kopiermöglichkeit um die Ersteinstellung zu erreichen war kläglich gescheitert und jetzt ist das Durcheinander noch größer beste Grüße B. Bein

Mozilla currently allows a user to select an AI Chatbot to use in the updated sidebar. The choices are limited to Anthropic Claude, ChatGPT, Google Gemini, Le Chat Mistral and Microsoft Copilot. When will Mozilla add Grok to this list of choices?

I can't copy/paste the information in messages in some of my e-mails. How can I unblock these messages.

I can copy/past these messages using other e-mail applications.

I am at (jfcanfield@comcast.net)

Every time I open the new version the following comes up in a window. By agreeing, you’ll allow Thunderbird Mail to access: Yahoo Contacts read and write Yahoo Calendar read and write Yahoo Mail read and write

The Yahoo Contacts and Yahoo Mail I can understand, But, I don't want a Yahoo Calendar. Is it somehow possible to allow Contacts and Mail, but exclude Calendar?

At one time before several updates ago, all messages in my inbox were separate. After a previous update, reply or messages with the same header started be be nested, each one showing only the sender and the subject, which is now the same. I am forced to read through them all to find the one I want. Deleting any in the change can be hazardous.

How to go back the old way of message display?

I started using Claude in the side panel instead of a dedicated tab, but there is something noise about it: every time I click to open the side panel the chat starts from scratch. Getting a clean slate is nice, but it takes too much time loading. So I would like to not unload the content of the panel when I close it, just hide it, so when I click to open is already loaded. There is a way to do that?

I have found in the settings where it looks like I can increase the font size to better see and read my emails, but it does not affect what I have.

How to increase font size to make reading easier?

Hello! It seems Thunderbird emails are suddenly being 'threaded'. It is causing great confusion in my office.

I need to see each email from a person separately in order to find them easily and also to reply to each one at the time it is received.

Can someone please explain in very simple non-techy jargon:- a) How I 'unthread' messages already threaded AND b) How I stop any new ones being threaded in the first place.

Thank you Tylex

Hello,

Why the hell did you guys decide to change the sort order of the "Move to" and "Copy to" Right-Click menu folders? How annoying! This makes Thunderbird *less* user friendly, not more user friendly. Do you guys even use Thunderbird? I suspect not, or you would have realized what a bad decision this was. I use these right-click menus every day, and now, because you guys decided to sort the order based on last used, I have to HUNT for the folder each time, because it is constantly changing! Before, I would know where that folder was in the list before I even right-clicked. Unless this gets fixed, I will go back to an older version of Thunderbird.

Instead of spending time changing features for the worse, how about doing something useful, like making Thunderbird work correctly with Protonmail?

Thanks!

This is what my messages look like . How do I get every line after "DATE" to not print like it used to. I am on version 115.10.1 My email is Fredwise@earthlink.net

115.10.1 From accounts@firefox.com TO FREDWISE@earthlink.net subject Use 950828 to confirm your account DATE Wed, 4 Mar 2026 02:08:02 +0000 Message ID <0101019cb69a2a0b-d2e09f40-9362-43dd-8164-9c6e0ff4882d-000000@mail.firefox.com

ETC for 30 or 40 more lines

Hello people,

When I compose a message in my word programme (Softmaker or Libre), save it in Docx format and copy/paste it into Thunderbird to send it everything is double spaced and nothing I do in the "compose" menu can change that.

I have tried it with "Use Paragraph Format" checked and unchecked and it stays doule spaced and nothing I can find in previous threads seems to address this problem.

What am I missing?

Kindest regards, Colin B 1 October 2025

Firefox suddenly has an AI assistant that pops up on a tool bar on the left side of the screen with a green dot beside it. I want to turn this off and make it disappear, if possible. Please tell me how to do that.

Since updating Thunderbird 64 bit to v147.0.2, then to v148.0 (1st March 2026, just now), requesting the display of 'Unified Folders' (in Folder Modes) does not populate the unified Inbox with messages from any of my eight registered email inbox sources. The individual inboxes with their contents can be displayed below, but not in the unified Inbox.

Since being introduced several versions ago, I have found this feature very useful when checking my various received emails, and it is frustrating to be without it.

Can anyone suggest what I may or may not be doing to get this feature to work any more? I have been all through Settings, but cannot find anything relevant to this problem.

Cheers, Sam

Okay FIREFOX, update 2/29/2026

1) making complaints to this browser is a nightmare, you guys need to actually do something about making it easier to contact actual support.

2) Firstly, this latest UI update is literally a scam. If you're going to make such a change after years of the same UI being around, users should be well aware of that before the update rolls in.

Secondly, this menu UI should have been an opt-in/out service, NOT DEFAULT. Users should have the option to not use a feature that is actively hostile to a MOBILE experience. That means less button pushing required to speedily access saved content. The current way this menu pops up puts nonsense on top before the actually important parts, namely bookmarks access.

3) bookmarks (specifically CREATING BOOKMARKS). While normal bookmarks access looks the same, creating them is a monster in this app.

This newest iteration sucks, to put it frankly. Where before, the process was simply running down the list to choose the right folder (all those folders & subfolders were already extended), now it requires us to extend and extend and extend and extend. In what world did you guys think this was useful for a mobile phone? Mobile does not lend itself to multiple presses, that's by design.

You guys are making this app look more and more like desktop, and that's a bad design and worse feature for mobile experiences.

Please either update this UI to allow for the legacy design (opt-in/out), or change it back entirely. Right now this app is trudging downwards to an experience people do not want to use.

Attached are screenshots of the current 3dot menu drop-down and the creation/editing of bookmarks. Too much noise for what was actually useful design on the legacy UI.

Within Tool Settings create an option to choose one of the current six choices to become the default view. Currently "General" is the only default view upon entering Tools,Settings. As is with me I suspect the most revisited choice within Tools, Settings is "Privacy & Security". Would be immensely pleasing if I could select "Privacy & Security" as default view when entering Tools,Settings .