Restore Ctrl+0 for resetting text size.

browser/base/content/browser.xul

@@ -236,6 +236,7 @@
     <key id="key_textZoomReduce"  key="&textZoomReduceCmd.commandkey;"   command="cmd_textZoomReduce"  modifiers="accel"/>
     <key id="key_textZoomEnlarge" key="&textZoomEnlargeCmd.commandkey;"  command="cmd_textZoomEnlarge" modifiers="accel"/>
     <key                          key="&textZoomEnlargeCmd.commandkey2;" command="cmd_textZoomEnlarge" modifiers="accel"/>
+    <key                          key="&textZoomResetCmd.commandkey;"    oncommand="ZoomManager.prototype.getInstance().reset();"   modifiers="accel"/>
     <key id="key_openDownloadsSidebar" key="&openDownloadsSidebar.commandkey;" command="viewDownloadsSidebar" modifiers="accel"/>
   </keyset>
   

browser/base/content/contentAreaUtils.js

@@ -195,7 +195,7 @@ function foundHeaderInfo(aSniffer, aData)
       return;
   
     var directory = fp.file.parent.QueryInterface(nsILocalFile);
-    prefs.setComplexValue("dir", nsILocalFile, directory);
+    // prefs.setComplexValue("dir", nsILocalFile, directory);
     fp.file.leafName = validateFileName(fp.file.leafName);
     filterIndex = fp.filterIndex;
     file = fp.file;

browser/base/locale/browser.dtd

@@ -242,6 +242,7 @@
 <!ENTITY textZoomReduceCmd.label        "Decrease Text Size">
 <!ENTITY textZoomReduceCmd.accesskey    "D">
 <!ENTITY textZoomReduceCmd.commandkey   "-">
+<!ENTITY textZoomResetCmd.commandkey    "0">
 
 <!ENTITY downloadsButton.label          "Downloads">
 <!ENTITY downloadsButton.tooltip        "Displays the progress of ongoing downloads">

toolkit/content/viewZoomOverlay.js

@@ -91,7 +91,9 @@ ZoomManager.prototype = {
   reduce : function() {
     this.jump(-1);
   },
-
+  reset : function() {
+    this.textZoom = 100;
+  },
   indexOf : function(aZoom) {
     var index = -1;
     if (this.isZoomInRange(aZoom)) {