Discussion of general topics about Mozilla Firefox

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Joined: January 3rd, 2006, 4:31 pm

Post Posted March 3rd, 2018, 4:17 am

I guess this is the one feature from Tab-Mix-Plus that I miss the most.

Does anyone know of an extension that will give you Multi-Row-Tabs with Quantum?


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Joined: December 7th, 2004, 8:51 pm
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Post Posted March 3rd, 2018, 8:27 am

Don't know of an extension to do this, but it's possible through userChrome customization.

See this page first:

Scroll down to the instructions/how-tos/readme section. I don't know how familiar you are or aren't with this stuff, so I would encourage you to poke around in that section as much as you think you need to. You can also see this: viewtopic.php?f=38&t=3037817

Then, following the guide, add the code from one or the other of these (but not both): ... _lines.css ... nes_v2.css
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Post Posted March 4th, 2018, 10:59 am

This works for me .....

Code: Select all
The class .tabbrowser-tabs has been replaced with id #tabbrowser-tabs
changed selectors accordingly
.tabbrowser-tab:not([pinned]) {
  min-width:133px !important; /* Needed important tag, width can be whatever you like */
  max-width: 233px !important; /* Makes the tabs always fill the toolbar width */
.tabbrowser-tab,.tab-background {
.tab-stack {
  width: 100%;
#tabbrowser-tabs .scrollbox-innerbox {
  display: flex;
  flex-wrap: wrap;
#tabbrowser-tabs .arrowscrollbox-scrollbox {
  overflow: visible;
  display: block;
  height:var(--tab-min-height) !important;
  margin-bottom:calc(var(--tab-min-height)*-1) !important;
#main-window[sizemode="maximized"] #titlebar{
  margin-bottom:calc(6px + var(--tab-min-height)*-1) !important;
#main-window[sizemode="maximized"] #TabsToolbar{
  margin-bottom:0 !important;
#titlebar:active #titlebar-content{
  margin-bottom:var(--tab-min-height) !important;
#tabbrowser-tabs .scrollbutton-up,#tabbrowser-tabs .scrollbutton-down,#alltabs-button,.tabbrowser-tab:not([fadein]){
  display: none;

 /* This enables maximum width before scrollbar is shown */

#main-window[tabsintitlebar] #tabbrowser-tabs {
  -moz-window-dragging: no-drag;
#tabbrowser-tabs .scrollbox-innerbox {
  max-height: 100px;
Mud is good!

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