Thunderbird Community Forum

I have Windows 11 and have a yellow on black theme. In Thunderbird I have the Dark theme.

The Folders in the folder pane are white. However, the messages in the message list pane are yellow.

What code can I put in the userChrome.css to make them white?

Hi all,

I tried to change the appearance of thunderbird using a userChrome.css file.

• I am sure it is located in the correct profile folder and has the correct name userChrome.css
• The userChrome.css file is also visible in the style editor of the development tools and displays the correct contents if I edit the file.
• I am sure that the toolkit.legacyUserProfileCustomizations.stylesheets is set to true
• I restarted tb millions of times

The contents of my userChrome.css file are currently (but I also played with different content):

/* Change background color for read messages */ treechildren::-moz-tree-row(read) {

   background-color: #f1f715 !important;  
   color: #6564cf !important; 

}

In the style editor, if i try to change the color code in one of the lines, it gives the following error messages:

Error while calling actor 'stylesheets's method 'update' document is null Actor.js:103:13

   writeError resource://devtools/shared/protocol/Actor.js:103
   handler resource://devtools/shared/protocol/Actor.js:242

InvisibleToDebugger: TypeError { } Actor.js:110:15

   writeError resource://devtools/shared/protocol/Actor.js:110
   handler resource://devtools/shared/protocol/Actor.js:242

I am running thunderbird 128.3.1esr (64-bit) on mac sonoma 14.6.1 (23G93)

Does anybody know how to get the style sheet running?

Thanks, ulrike

The 'Message Header' is the area above where the message content of an opened email is displayed. It typically contains a set of buttons - Reply, Forward, Archive, Junk, Delete and More It shows From, To, Subject and Date It may show other information depending upon settings and type of email.

Do you find the spacing between eg: the 'From' line and the 'TO' line is too much? Do you want to reduce this gap? If yes, then the following information may solve your problem.

I was upgraded to TB 115 when I had to get a new computer. I have become quite used to using userchrome to highly personalise my TB, mainly to restore previous features.

However, somehow, in making the "Write" screen the way I like it, I have shrunk the section of the Contacts Sidebar which contains the actual addresses/contacts, down to the point where only one contact is visible. There is a scroll bar so I can see the other addresses are there. It is just that the bottom border of that box has elevated itself and there is a mass of blank space below.

I am sure I have caused it with some code, however everything I have tried to adjust only works on the heading part of the Contacts Sidebar, not the panel with the addresses. I have searched the net to find out what that panel is officially called, without success.

Could a helpful person tell me the "official" name (to use in the css) of that panel so that I can fix it? Or even write me a little code to make that box go back to default?

Just for context, the reason I was fiddling with it was because the panel is excessively spaced, and I was trying to compact the contacts together.

Thanks Fiona

Have you discovered that you cannot raise the 'Message Pane' as far upwards as in previous versions? This is because the developers have increased the minimum height of the Thread Pane otherwise known as 'Message List'.

Hi, In TB 102 the menu toolbar was still above the button toolbar, if I am not mistaken. In TB 115 this seems to have changed... I could not find a way to customize it back as it was. Pointers anyone ? Thank you.

Hi,

after updating to new Thunderbird 115.0 menu bar appeared below tool bar and I couldn't find a way how to put it above as in previous versions. Please see attached image. Any idea?

Thank you.

Hello, I have been using a custom userChrome.css in the past, but it does not work since I upgraded to 115.0.1

Is the userChrome.css still supported? I have turned it on in config mgr, and tried every resource I cna find on the web, but my userChrome.css is ignored.

TIA...

Hello,

The new UI has this massive customizable toolbar at the top of the screen, it wastes a lot of space and doesn't look good compared to the old UI, you can fully customize it even leaving it blank but that does not remove it entirely and it looks off with just a blank nothing up there, where is the option to completely remove this new toolbar?

Regards,

If you have enabled the Menu Bar, maybe you find it is the same colour as the Unified folder and want to change it. Maybe you want to change the colour of the opened Tabs. Read the information below to help you use 'userChrome.css' and tailor make your own Thunderbird.

I have a userChrome.css to change the color of unread messages in the "list of messages" pane to orange:

/* Messagepane text */ treechildren::-moz-tree-cell-text(new) {

       color: #34ebdc !important;
       font-weight: normal;

} treechildren::-moz-tree-cell-text(unread) {

       color: #34c6eb !important;
       font-weight: normal !important;

}

This worked fine in TB 102 and prior. When I upgraded to TB 115 this no longer has any effect. I'm not sure if the userChrome.css is being ignored or if the styling elements in userChrome.css have changed.

I'm on Windows 11 and userChrome.css is located in 2 places: C:\Users\$username\AppData\Roaming\Thunderbird\Profiles\$profile.default\chrome\userChrome.css C:\Users\$username\Application Data\Thunderbird\Profiles\$profile.default\chrome\userChrome.css

Hi. I really like the new look of 115, but the file menu should be above the toolbar. Is there a way to put the file menu at the top of the window (above the toolbar)?

Thanks

If you want your 'Message List' to use alternative colour stripes often refered to as zebra style then I have put together some code and instructions on how to create the effect.

Obviously you may need to modify the actual colours used. The following works on a Light theme. The striping is white and pale grey. On hover the text is black on a pale blue background. On select the text is white on a light blue background, but strong enough to show white text clearly.

I'd like the list of messages in a stronger font, with less white space. And distinguishing unread messages by color instead of bold.

Can any of that be configured?

I'm a Thunderbird newbie, moving from Agent where the inbox displayed twice as many message headers in the same space, but was more readable because all messages were in a bold font but the unread messages were in red.

I want the unread messages in the list of messages pane to be "orange". I had the following in userChrome.css which worked prior to TB 115:

/* Messagepane text */ treechildren::-moz-tree-cell-text(new) {

      color: #34ebdc !important;
      font-weight: normal;

} treechildren::-moz-tree-cell-text(unread) {

      color: #34c6eb !important;
      font-weight: normal !important;

}

When I upgraded to TB 115 this no longer has any effect. How do I do this in TB 115+?

Thanks. mike

After upgrading to 115.0, the mailbox display has an all-white background. This is not nearly as easy to read is in version 112, which has alternating lines of white & grey for the background.

How can I customize 115 to have alternating colours for the background of each summary line?

Yesterday I tried the 115 (Supernova) and I was disappointed because of the toolbar on top of the TB window: I think that you should let the user choose where put any toolbar, and I didn't find the way to move in its "classical" place (not at top but below the menu). There is a way to do it? And if not, please consider to give it as soon as possible.

Re: userchrome.css It appears only part of my userchrome file affects customization in latest release (115).

Q: Is there any information on how to do customizations for the following specific items: 1. message pane grid lines, 2. message row alternating colors 3. thickness of all pane splitters?

Thanks for any leads....