--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -465,17 +465,21 @@ pref("browser.tabs.warnOnOpen", true);
 pref("browser.tabs.maxOpenBeforeWarn", 15);
 pref("browser.tabs.loadInBackground", true);
 pref("browser.tabs.opentabfor.middleclick", true);
 pref("browser.tabs.loadDivertedInBackground", false);
 pref("browser.tabs.loadBookmarksInBackground", false);
 pref("browser.tabs.loadBookmarksInTabs", false);
 pref("browser.tabs.tabClipWidth", 140);
 pref("browser.tabs.tabMinWidth", 76);
+#ifdef UNIX_BUT_NOT_MAC
+pref("browser.tabs.drawInTitlebar", false);
+#else
 pref("browser.tabs.drawInTitlebar", true);
+#endif
 
 // Offer additional drag space to the user. The drag space
 // will only be shown if browser.tabs.drawInTitlebar is true.
 pref("browser.tabs.extraDragSpace", false);
 
 // 0 - Disable the tabbar session restore button.
 // 1 - Enable the tabbar session restore button.
 // 2 - Control group. The tabbar session restore button is disabled,