diff --git a/mozilla/extensions/irc/Makefile.in b/mozilla/extensions/irc/Makefile.in
index 60c8a894ccb..43bd25459e3 100644
--- a/mozilla/extensions/irc/Makefile.in
+++ b/mozilla/extensions/irc/Makefile.in
@@ -9,7 +9,7 @@
 # for the specific language governing rights and limitations under the
 # License. 
 #
-# The Original Code is Mozilla IRC Extentions, including Basic Socket Library,
+# The Original Code is Mozilla IRC Extensions, including Basic Socket Library,
 # and JSIRC Library.
 #
 # The Initial Developer of the Original Code is New Dimensions Consulting,
diff --git a/mozilla/extensions/tasks/Makefile.in b/mozilla/extensions/tasks/Makefile.in
index 7c4df3cd029..59988af9bb3 100644
--- a/mozilla/extensions/tasks/Makefile.in
+++ b/mozilla/extensions/tasks/Makefile.in
@@ -9,7 +9,7 @@
 # for the specific language governing rights and limitations under the
 # License. 
 #
-# The Original Code is Mozilla Calendar Extentions
+# The Original Code is Mozilla Calendar Extensions
 #
 # The Initial Developer of the Original Code is mozilla.org
 #
diff --git a/mozilla/modules/plugin/base/public/npapi.h b/mozilla/modules/plugin/base/public/npapi.h
index 70739f27d32..83a0046081b 100644
--- a/mozilla/modules/plugin/base/public/npapi.h
+++ b/mozilla/modules/plugin/base/public/npapi.h
@@ -38,7 +38,7 @@
 
 
 /*
- *  npapi.h $Revision: 3.32 $
+ *  npapi.h $Revision: 3.33 $
  *  Netscape client plug-in API spec
  */
 
@@ -130,7 +130,7 @@
 
 
 /* The OS/2 version of Netscape uses RC_DATA to define the
-   mime types, file extentions, etc that are required.
+   mime types, file extensions, etc that are required.
    Use a vertical bar to separate types, end types with \0.
    FileVersion and ProductVersion are 32bit ints, all other
    entries are strings the MUST be terminated wwith a \0.
diff --git a/mozilla/modules/plugin/base/public/nsplugindefs.h b/mozilla/modules/plugin/base/public/nsplugindefs.h
index aaaaf4c37f2..8efbf11d239 100644
--- a/mozilla/modules/plugin/base/public/nsplugindefs.h
+++ b/mozilla/modules/plugin/base/public/nsplugindefs.h
@@ -67,7 +67,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 /* The OS/2 version of Netscape uses RC_DATA to define the
-   mime types, file extentions, etc that are required.
+   mime types, file extensions, etc that are required.
    Use a vertical bar to separate types, end types with \0.
    FileVersion and ProductVersion are 32bit ints, all other
    entries are strings the MUST be terminated wwith a \0.
diff --git a/mozilla/xpfe/components/filepicker/src/nsFilePicker.js b/mozilla/xpfe/components/filepicker/src/nsFilePicker.js
index e2807b3fcba..5e283106d1f 100644
--- a/mozilla/xpfe/components/filepicker/src/nsFilePicker.js
+++ b/mozilla/xpfe/components/filepicker/src/nsFilePicker.js
@@ -158,9 +158,9 @@ nsFilePicker.prototype = {
     }
   },
 
-  appendFilter: function(title, extentions) {
+  appendFilter: function(title, extensions) {
     this.mFilterTitles.push(title);
-    this.mFilters.push(extentions);
+    this.mFilters.push(extensions);
   },
 
   QueryInterface: function(iid) {
diff --git a/mozilla/xpfe/components/filepicker/src/nsFilePicker.js.in b/mozilla/xpfe/components/filepicker/src/nsFilePicker.js.in
index e2807b3fcba..5e283106d1f 100644
--- a/mozilla/xpfe/components/filepicker/src/nsFilePicker.js.in
+++ b/mozilla/xpfe/components/filepicker/src/nsFilePicker.js.in
@@ -158,9 +158,9 @@ nsFilePicker.prototype = {
     }
   },
 
-  appendFilter: function(title, extentions) {
+  appendFilter: function(title, extensions) {
     this.mFilterTitles.push(title);
-    this.mFilters.push(extentions);
+    this.mFilters.push(extensions);
   },
 
   QueryInterface: function(iid) {