@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
/* The above line should appear only once in the file */

#TabsToolbar { -moz-box-ordinal-group: 99 !important }

Each setting you see in a computer program you use requires work; when a developer wants to build something new or improve something, he or she has to go through each related (hidden) setting and test if it still works like before and do that on each platform Firefox runs on. That's Apple's Mac OSX, various flavours of Linux and various flavours of Windows, including Windows XP. This costs time, lots of it, and that amount grows exponentially with each setting that's added. This comes on top of our work to continuously fix, improve and innovate Firefox. 
 
 That's why we also removed the tabs.onTop preference. Awesome community members, who were unhappy about that change, created the Classic Theme Restorer add-on. They deserve our collective hugs. 

You can use either of the following add-ons. * https://addons.mozilla.org/firefox/addon/tabs-on-bottom/ * https://addons.mozilla.org/firefox/addon/classicthemerestorer/ If you don't want to install an add-on, put the following style in the ''userChrome.css'' file and restart Firefox. You can use [https://addons.mozilla.org/firefox/addon/stylish/ the Stylish add-on] instead, if you have it installed. * http://kb.mozillazine.org/UserChrome.css ---- <pre><nowiki>@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul); /* The above line should appear only once in the file */ #TabsToolbar { -moz-box-ordinal-group: 99 !important }</nowiki></pre> ---- Also see * [[How to make the new Firefox look like the old Firefox]] ---- '''One of the developers recently posted this explanation''' [https://support.mozilla.org/en-US/user/1079955 MikeDeboer] said Each setting you see in a computer program you use requires work; when a developer wants to build something new or improve something, he or she has to go through each related (hidden) setting and test if it still works like before and do that on each platform Firefox runs on. That's Apple's Mac OSX, various flavours of Linux and various flavours of Windows, including Windows XP. This costs time, lots of it, and that amount grows exponentially with each setting that's added. This comes on top of our work to continuously fix, improve and innovate Firefox. <br /> <br /> That's why we also removed the tabs.onTop preference. Awesome community members, who were unhappy about that change, created the Classic Theme Restorer add-on. They deserve our collective hugs. *'''For more linked help articles and the full quote please also see''' <br /> ''Why have you changed design in new Firefox 29.0?'' [/questions/998084#answer-566525]