bug 476897 - add pref to disable caret browsing/f7 - r=gavin

modules/libpref/src/init/all.js

@@ -154,6 +154,8 @@ pref("gfx.downloadable_fonts.enabled", true);
 pref("accessibility.browsewithcaret", false);
 pref("accessibility.warn_on_browsewithcaret", true);
 
+pref("accessibility.browserwithcaret_shortcut.enabled", true);
+
 #ifndef XP_MACOSX
 // Tab focus model bit field:
 // 1 focuses text controls, 2 focuses other form elements, 4 adds links.

toolkit/content/widgets/browser.xml

@@ -1002,6 +1002,10 @@
           if (event.getPreventDefault() || !event.isTrusted)
             return;
 
+          var isEnabled = this.mPrefs.getBoolPref("accessibility.browsewithcaret_shortcut.enabled");
+          if (!isEnabled)
+            return;
+
           // Toggle browse with caret mode
           var browseWithCaretOn = false;
           var warn = true;