diff --git a/l10n/en-US/chrome.properties b/l10n/en-US/chrome.properties
index 2b3dce42f..0b469195c 100644
--- a/l10n/en-US/chrome.properties
+++ b/l10n/en-US/chrome.properties
@@ -1,3 +1,17 @@
+# Copyright 2012 Mozilla Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # Chrome notification bar messages and buttons
 unsupported_feature=This PDF document might not be displayed correctly.
 open_with_different_viewer=Open With Different Viewer
diff --git a/l10n/en-US/viewer.properties b/l10n/en-US/viewer.properties
index 284ef77fa..0ed13f534 100644
--- a/l10n/en-US/viewer.properties
+++ b/l10n/en-US/viewer.properties
@@ -1,3 +1,17 @@
+# Copyright 2012 Mozilla Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # Main toolbar buttons (tooltips and alt text for images)
 previous.title=Previous Page
 previous_label=Previous