Tabs below address bar in Firefox 131.0.3


cliveyg13

Member
Local time
10:45 PM
Posts
3
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Windows 11
Hi all...anyone worked out how to place open tabs below the address bar? I don't like them at the top of the screen.

TIA

Clive
 

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Hello @cliveyg13 and welcome to ElevenForum. :-)




Also, I gave you ten points, just for filling out your computer specs. :-)
 

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    Win 11 Home ♦♦♦26100.3775 ♦♦♦♦♦♦♦24H2 ♦♦♦non-Insider
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    Built by Ghot® [May 2020]
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This is from an answer from sifferedd that fixed the issue for me. I changed the background-color to what you see here:

Code:
/* Places the Menu Bar - File, Edit, View etc. at the top */
.titlebar-buttonbox-container {
  position: fixed;
  top: 0px;
  right: 0px;}

#button-appmenu {
  position: fixed;
  top: 0px;
  right: 10px;}


/* Color of menu bar - white, Color of the text is black */
#toolbar-menubar {
  order: 1;
background-color: #FFFFFF !important; 
color: #000000 !important;}

unified-toolbar {
  order: 2;}

#tabs-toolbar {
  order: 3;
background-color: #D3D3D3 !important;  /* light grey */
color: #000000 !important; /* black */}
 

My Computer

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    Windows 11 in VirtualBox
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    Intel Core i5 4690K @ 3.50GHz
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    Firefox
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    Windows Anti-virus
Thanks davidhelp...so what do I do with this code??

thanks
 

My Computer

System One

  • OS
    Windows 11
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    AMD Ryzen 5 4500 six core
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    Gigabyte A520M k V2
    Memory
    32gb PCS Pro DDR4 3200MHz
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    2gb Nvidia GEforce GT 730
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    Onboard 6 Channel HD Audio
    Monitor(s) Displays
    Samsung S27D590C
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    1920 x 1080
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    SSD 256gb PCS PCIe M.2
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To enable the changes you need to go to the Config editor in Thunderbird. If not then the userChrome.css file you create will not work.

Two ways to start is to click on the Hamburger menu - the 3 horizontal lines in the upper right of the program or again the Hamburger menu> View> Toolbars> click to check the Menu Bar and Status Bar From the top you go to Tools> Settings> General then scroll all the way down on the right side and click on “Config Editor” and search for then double-click on:

toolkit.legacyUserProfileCustomizations.stylesheets

Change preference from false to true. Close Thunderbird then re-open.
You only have to do this one time.

You can right click on the program icon and Pin to Start menu and then you can drag around in the order you want. You can also drag the icon onto your Desktop for ease in finding.

Start button> Windows System folder.
Here you find: This PC and File Explorer & Control Panel

The email Profile is located here. You have to open This PC> View tab and check the box for Hidden items to see the AppData folder.
From there you drill down to your Thunderbird Profile folder.
Example:
C:\Users\"your name"\AppData\Roaming\Thunderbird\Profiles\ "Your profile name” 8jyu1eib.default-release

Another way to get there:
In Thunderbird go to the Menu bar at the top (see above to view) then Help > Troubleshooting Information
In 'Application Basics' go to Profile Folders and click on 'Open Folder' button.

A new window opens showing the contents of your profile name folder.
Click on the New folder button on the toolbar or right click and New> Folder

You create a folder and call it Chrome and copy the userChrome.css file to it.
The names are case sensitive.

How to create the userChrome.css file
Open Notepad which is located from Start button> Windows Accessories
Here you find: Notepad

Next go to File> Save as> Save as type> choose All files in the drop down menu.
Type the name: userChrome.css
Click on the Save button.
You will copy the code you see below into it, make any changes you want and Save again.
Open Thunderbird to see any changes.
 

My Computer

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  • OS
    Windows 11 in VirtualBox
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    PC/Desktop
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    Intel Core i5 4690K @ 3.50GHz
    Motherboard
    Gigabyte Z97X-UD5H
    Memory
    32GB DDR3
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    4095MB NVIDIA GeForce GTX 1650
    Sound Card
    Sound Blaster Z
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    Dell G3223Q Monitor - 32-Inch 4K Ultra UHD (3840x2160), 144Hz 1Ms Display
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    Jelly Comb
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    1GB
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    Firefox
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    Windows Anti-virus
Here is my whole code that shows what you can do. You can make any changes then save and re-open Thunderbird to see the changes.
I got some of these answers by posting my questions here and at Reddit from sifferedd, das10, antspants among others.
Firefox can also be modified too the same way with the userChrome.css file but separate from Thunderbird.
The code for Firefox seen at this link still works and the program below makes it easy to have many tabs open in many rows plus move the the Tab bar.
Ignore the instructions for Thunderbird there as it is for older versions below version 115.

Multirow-Patcher-Quantum-Nox-Installer-Windows-1.8.15.exe

Code:
/* Places the Menu Bar - File, Edit, View etc. at the top */
.titlebar-buttonbox-container {
  position: fixed;
  top: 0px;
  right: 0px;}

#button-appmenu {
  position: fixed;
  top: 0px;
  right: 10px;}


/* Color of menu bar - white, Color of the text is black */
#toolbar-menubar {
  order: 1;
background-color: #FFFFFF !important;
color: #000000 !important;}

unified-toolbar {
  order: 2;}

#tabs-toolbar {
  order: 3;
background-color: #D3D3D3 !important;  /* light grey */
color: #000000 !important; /* black */}


/* Message List Pane - Background-color odd rows - light grey & text color dark green */
table.tree-table tr:nth-child(odd)
{background-color: #F7F7F6; color: #0D3C39 !important; font-family: 'Calibri'; font-size: 14px; font-weight: normal; !important;}

/* Message List Pane - Background-color even rows - white color & text color dark green */
table.tree-table tr:nth-child(even)
{background-color: #FFFFFF; color: #0D3C39 !important; font-family: 'Calibri'; font-size: 14px; font-weight: normal; !important;}

/* Message List Pane - light blue color when row is selected */
[is="tree-view-table-body"] > .selected {
  color: black !important;
  background-color: #52aaff !important;}

/* Message List Pane - light green specified on hover with left side red border */
tr[is="thread-row"]:hover {
  background-color: #66CDAA !important;
border-left: 5px solid red; !important;}


/* Message List Pane - Grid lines */
#threadTree table[is="tree-view-table"] {
  border-collapse: collapse !important;}

#threadTree tr[is="thread-row"] {
  border-bottom: 1px solid green !important;}

#threadTree tr[is="thread-row"] td {
  border-right: 1px solid green !important;}


/* Folder Pane - background color is light grey */
#folderPane, #folderPaneHeaderBar {
background-color: #F0F0F0 !important;}


/* Folder Pane - folder names, font, font size - text color is dark green*/
.name {color: #0D3C39 !important; font-family: 'Georgia'; font-size: 12px; font-weight: 600; !important;}


/* Folder Pane - hover color, once a row is clicked on it will either display the Windows Titlebar color you choose if you do not specify a color here. The hover color will continue on any other row you hover over. hover color is light green, border-left is red */
.container:hover {
  background-color: #66CDAA !important;
  border-color: transparent !important;
  border-left: 3px solid  #FF0000 !important;}


/* Folder Pane - light blue specified */
li.selected > .container {
  color: black !important;
  background-color: #52aaff !important;
  border: 0px solid #000000 !important;}


/* this is the color when you drag an email to another folder and that folder is highlighted. Light green color */
#folderTree:focus-within li.selected > .container,
#folderTree li.drop-target > .container {
  background-color: #66CDAA !important;
  border: 0px solid red !important;
  border-radius: 0px;}


/* This is the height of the From Me, To, Subject lines from each other. The bigger the number the wider the spread in height   */
#messageHeader {row-gap: 0px !important;}


/* Write Window Contacts Panel. Write New Message Window: address background-color & color AND hover background-color & color */

/* hover is light green */
#abResultsTree tbody tr:hover {
background-color: #66CDAA  !important;
color:            black   !important;   /* text color */
outline-offset:  -0px               !important;  
outline:          0px solid #000000 !important;
}

/* selected is light blue */
#abResultsTree tbody tr:is(.current,.selected) {
background-color: #52aaff  !important;
color:            black   !important;   /* text color */
outline-offset:  -0px               !important;  
outline:          0px solid #000000 !important;
}
 
Last edited:

My Computer

System One

  • OS
    Windows 11 in VirtualBox
    Computer type
    PC/Desktop
    Manufacturer/Model
    Gigabyte
    CPU
    Intel Core i5 4690K @ 3.50GHz
    Motherboard
    Gigabyte Z97X-UD5H
    Memory
    32GB DDR3
    Graphics Card(s)
    4095MB NVIDIA GeForce GTX 1650
    Sound Card
    Sound Blaster Z
    Monitor(s) Displays
    Dell G3223Q Monitor - 32-Inch 4K Ultra UHD (3840x2160), 144Hz 1Ms Display
    Screen Resolution
    3840x2160@144Hz
    Hard Drives
    Samsung SSD 4TB
    Keyboard
    4Tech
    Mouse
    Jelly Comb
    Internet Speed
    1GB
    Browser
    Firefox
    Antivirus
    Windows Anti-virus
Hi again...sorry to be a bit ignorant, but what is Thunderbird??

Thanks
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    PC Specialist
    CPU
    AMD Ryzen 5 4500 six core
    Motherboard
    Gigabyte A520M k V2
    Memory
    32gb PCS Pro DDR4 3200MHz
    Graphics Card(s)
    2gb Nvidia GEforce GT 730
    Sound Card
    Onboard 6 Channel HD Audio
    Monitor(s) Displays
    Samsung S27D590C
    Screen Resolution
    1920 x 1080
    Hard Drives
    SSD 256gb PCS PCIe M.2
    2TB Seagate Barraqcuda Sata-III 7200rpm 256mb cache (x 2)
    PSU
    Corsair 550W CX Series
    Case
    PCS Element Case
    Cooling
    Standard AMD Wraith Stealth Cooler
    Keyboard
    Logitech Wireless 820
    Mouse
    Logitech Wireless M185
    Internet Speed
    10/100
    Browser
    Firefox
    Antivirus
    Microsoft Defender
Hi again...sorry to be a bit ignorant, but what is Thunderbird??

Thanks
Thunderbird is Mozilla's Email application, totally separate from Firefox
 

My Computer

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  • OS
    Windows 11 Intel i5 10400 HD630 graphics chip
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
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    i5-10400
    Memory
    12 gb
    Graphics Card(s)
    HD630 chipset
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    LG 24inch
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    SSD, external usb drive 1tb for files/backups
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    wireless Logi
    Mouse
    ms 4000 wireless mouse
    Internet Speed
    10meg
    Browser
    Firefox
    Antivirus
    Defender
    Other Info
    Win11 Home 24h2 26100.3915 4/25/2025
Here is my Firefox 131.0.3 userChrome.css file.
It is located here: C:\Users\your user folder\AppData\Roaming\Mozilla\Firefox\Profiles\your profile 9maqs279.default-release\Chrome

Code:
/* base all tabs, round corners, full height */
.tabbrowser-tab .tab-background {border-top: 1px solid #c7c7c8; !important; border-right: 1px solid #c7c7c8; !important; border-left: 1px solid #c7c7c8; !important;
border-radius: 8px 8px 0 0 !important; margin-top: 0px !important; margin-bottom: 0px !important;}

/* adjust height w/ margin top, background unselected tabs */
.tabbrowser-tab:not([selected], [multiselected], :hover) .tab-background {background-color: #f9f9fb !important; margin-top: 6px !important;}


/* green background selected tab  66CDAA */
.tabbrowser-tab:is([selected], [multiselected]) .tab-background  {background-color: #66CDAA !important;}


/* orange background on hover over tab */
.tabbrowser-tab:hover:not([selected]) .tab-background {background-color: #FF7F50 !important;}


/* blue background on hover or selected */
.sidebar-placesTree treechildren::-moz-tree-row(hover),
.sidebar-placesTree treechildren::-moz-tree-row(selected) {background-color: #0080ff !important;}


/*change the font in the Firefox user interface menu bar and other toolbars */
#navigator-toolbox { font-family:Verdana; color: #000000  !important }


/* Sidebar Color / Font Size Formatting */
/* 15px black text */
.sidebar-placesTree treechildren::-moz-tree-cell-text {font-size: 15px !important; color: #000 !important;}
 

My Computer

System One

  • OS
    Windows 11 in VirtualBox
    Computer type
    PC/Desktop
    Manufacturer/Model
    Gigabyte
    CPU
    Intel Core i5 4690K @ 3.50GHz
    Motherboard
    Gigabyte Z97X-UD5H
    Memory
    32GB DDR3
    Graphics Card(s)
    4095MB NVIDIA GeForce GTX 1650
    Sound Card
    Sound Blaster Z
    Monitor(s) Displays
    Dell G3223Q Monitor - 32-Inch 4K Ultra UHD (3840x2160), 144Hz 1Ms Display
    Screen Resolution
    3840x2160@144Hz
    Hard Drives
    Samsung SSD 4TB
    Keyboard
    4Tech
    Mouse
    Jelly Comb
    Internet Speed
    1GB
    Browser
    Firefox
    Antivirus
    Windows Anti-virus

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