--- a/suite/browser/browser-prefs.js
+++ b/suite/browser/browser-prefs.js
@@ -607,16 +607,26 @@ pref("privacy.item.downloads",   true);
 pref("privacy.item.cookies",     false);
 pref("privacy.item.cache",       true);
 pref("privacy.item.sessions",    true);
 pref("privacy.item.offlineApps", false);
 
 pref("privacy.sanitize.sanitizeOnShutdown", false);
 pref("privacy.sanitize.promptOnSanitize", true);
 
+/* mousewheel.withcontrolkey.action:
+ * 0 = lines
+ * 1 = pages
+ * 2 = history
+ * 3 = text or full zoom depending on "browser.zoom.full".
+ */
+pref("mousewheel.withcontrolkey.action",3);
+pref("mousewheel.withcontrolkey.sysnumlines",false);
+pref("mousewheel.withcontrolkey.numlines",1);
+
 // Show XUL error pages instead of alerts for errors
 pref("browser.xul.error_pages.enabled", true);
 pref("browser.xul.error_pages.expert_bad_cert", false);
 
 // Setting this pref to |true| forces BiDi UI menu items and keyboard shortcuts
 // to be exposed. By default, only expose it for bidi-associated system locales.
 pref("bidi.browser.ui", false);