diff --git a/browser/locales/en-US/chrome/browser/devtools/sourceeditor.properties b/browser/locales/en-US/chrome/browser/devtools/sourceeditor.properties
index f11c0493cb96..170b9ba271b9 100644
--- a/browser/locales/en-US/chrome/browser/devtools/sourceeditor.properties
+++ b/browser/locales/en-US/chrome/browser/devtools/sourceeditor.properties
@@ -49,17 +49,17 @@ annotation.currentLine=Current line
 # user-defined lines.
 annotation.debugLocation.title=Current step: %S
 
-# LOCALIZATION NOTE  (jumpToLine.commandkey): This the key to use in
+# LOCALIZATION NOTE  (jumpToLine.commandkey): This is the key to use in
 # conjunction with accel (Command on Mac or Ctrl on other platforms) to jump to
 # a specific line in the editor.
 jumpToLine.commandkey=J
 
-# LOCALIZATION NOTE  (toggleComment.commandkey): This the key to use in
+# LOCALIZATION NOTE  (toggleComment.commandkey): This is the key to use in
 # conjunction with accel (Command on Mac or Ctrl on other platforms) to either
 # comment or uncomment selected lines in the editor.
 toggleComment.commandkey=/
 
-# LOCALIZATION NOTE  (toolboxPrevTool.commandkey): This the key to use in
+# LOCALIZATION NOTE  (indentLess.commandkey): This is the key to use in
 # conjunction with accel (Command on Mac or Ctrl on other platforms) to reduce
 # indentation level in CodeMirror. However, its default value also used by
 # the Toolbox to switch between tools so we disable it.
@@ -67,7 +67,7 @@ toggleComment.commandkey=/
 # DO NOT translate this key without proper synchronization with toolbox.dtd.
 indentLess.commandkey=[
 
-# LOCALIZATION NOTE  (toolboxPrevTool.commandkey): This the key to use in
+# LOCALIZATION NOTE  (indentMore.commandkey): This is the key to use in
 # conjunction with accel (Command on Mac or Ctrl on other platforms) to increase
 # indentation level in CodeMirror. However, its default value also used by
 # the Toolbox to switch between tools