Sub-tabs in Firefox

April 2018

It is possible to have sub-tabs under firefox, to improve you browsing experience.
  • To activate this option just type chrome://browser/content/browser.xul in the address bar.
  • It is use handy if you have a small screen.
  • Note that this feature is still under developpement and that there are some bugs.
  • Note that you are not limited to only 2 rows of tabs, you can still expand it furthermore by typing the same code in the address bar of an opened tab, though it's use is quite questionable.
Published by jak58. Latest update on February 12, 2010 at 08:21 AM by jak58.
This document, titled "Sub-tabs in Firefox," is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (
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