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How to move tab bar down in Firefox 57?

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How to move tab bar down in Firefox 57? Option about:config and browser.tabs.onTop = false doesn't exist in this version of Firefox

How to move tab bar down in Firefox 57? Option about:config and browser.tabs.onTop = false doesn't exist in this version of Firefox

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That's an old pref and hasn't been around for years. You need to create a userChrome.css and copy / paste some code to achieve tabs on bottom.

Code to paste below: /* Tab bar below Navigation & Bookmarks Toolbars For best results, show Title Bar or Menu Bar */ #nav-bar { /* main toolbar */ -moz-box-ordinal-group: 1 !important; border-top-width: 0 !important; } #PersonalToolbar { /* bookmarks toolbar */ -moz-box-ordinal-group: 2 !important; } #TabsToolbar { /* tab bar */ -moz-box-ordinal-group: 3 !important; }

If you were a Classic Theme Restorer user, you can use the code below made by the developer of CTR.