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How can I move to Tabs on Bottom on Firefox 57 on, so I can update from version 56.

  • 4 replies
  • 1 has this problem
  • Last reply by jscher2000

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An earlier discussion of how to do Tabs on Bottom under the new Firefox included suggestions that were too complicated for me. Has any progress occurred since then to make Tabs on Bottom easier now?

Note: My current browser is FF 56.0.2; my operating system is Windows 10.

I’ve always used Tabs on Bottom, which to my mind is much easier than having to search on top, farther away from the main screen. Firefox has once again stymied me and many others by bringing on a new version which, among other things, does not allow for Tabs on Bottom, nor does Classic Restorer work for this. So I’ve been using version 56 since then, but I know it’s not a good idea to avoid updates for too long.

The earlier discussion basically advised to just live with it. If I have to have Tabs on Top, then maybe I’ll just switch to Chrome, which I’ve heard is better in other respects, at least since I have an Android phone. However, even though Firefox hasn’t treated me very well, I have used it for a number of years and like it a lot in the past.

PS: It seems to be harder to Ask the Community than it used to. I posted this question first on what appeared afterward to be a developer forum. Maybe this is the same site, in which case i've posted a duplicate, but I'm not sure. It seems to me that FF is getting less and less user-friendly.

All Replies (4)

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Hi, all you need to do is Click on Help in the Menu.

You are not saying if Tabs on Bottom are below the Address Bar or Bottom of the Browser...... ?

You need to find the right usserChrome code : following video starting around 8:45 Also this answer :

Please let us know if this solved your issue or if need further assistance.

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So make a text file and copy/paste the code, rename to userChrome.css and place it in the chrome folder of Firefox :

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It is not that difficult to create userChrome.css if you have never used it.

The first step is to open the "Help -> Troubleshooting Information" page and find the button to access the profile folder.

You can find this button under the "Application Basics" section as "Profile Folder -> Open Folder". If you click this button then you open the profile folder in the Windows File Explorer. You need to create a folder with the name chrome in this folder (name is all lowercase). In the chrome folder you need to create a text file with the name userChrome.css (name is case sensitive). In this userChrome.css text file you paste the text posted.

In Windows saving the file is usually the only time things get more complicated because Windows can silently add a .txt file extension and you end up with a file named userChrome.css.txt. To avoid this you need to make sure to select "All files" in the dialog to save the file in the text editor using "Save File as".

Add this code to the userChrome.css file below the default @namespace line.

@namespace url(""); /* only needed once */

:root {
  /* fix for full screen mode */
  --tab-toolbar-navbar-overlap: 0px !important;
  /* set minimum tab height  */
  --tab-min-height: 30px !important;

/* tabs on bottom */
#navigator-toolbox toolbar:not(#nav-bar):not(#toolbar-menubar) {-moz-box-ordinal-group:10}
#TabsToolbar {-moz-box-ordinal-group:1000!important}

/* Tab bar: adjust height - chrome://browser/skin/browser.css */
#TabsToolbar {height:var(--tab-min-height)!important; margin-top:-1px!important; margin-bottom:1px!important}
#tabbrowser-tabs {border-left: 1px threedshadow solid}

/* Tab bar: override vertical shifts when moving a tab */
#TabsToolbar[movingtab] {padding-bottom:0px!important}
#TabsToolbar[movingtab] > .tabbrowser-tabs {padding-bottom:0px!important; margin-bottom:0px!important}
#TabsToolbar[movingtab] + #nav-bar {margin-top:0px!important}

Modified by cor-el

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Elbara said

The earlier discussion basically advised to just live with it.

No, you definitely do not need to accept that for an answer. But you do need to roll up your sleeves for 10 minutes and set up a userChrome.css file. Once you've discovered the power that gives you, it may be hard to resist making more changes. ;-)