diff --git a/toolkit/components/reputationservice/ApplicationReputation.cpp b/toolkit/components/reputationservice/ApplicationReputation.cpp
index 7f14f38840ab..cc2b196ce576 100644
--- a/toolkit/components/reputationservice/ApplicationReputation.cpp
+++ b/toolkit/components/reputationservice/ApplicationReputation.cpp
@@ -181,6 +181,8 @@ const char* const ApplicationReputationService::kBinaryFileExtensions[] = {
     ".applescript",
     //".application", exec // MS ClickOnce
     //".appref-ms", exec // MS ClickOnce
+    //".appx", exec
+    //".appxbundle", exec
     //".arc",
     //".arj",
     ".as",  // Mac archive
@@ -334,6 +336,8 @@ const char* const ApplicationReputationService::kBinaryFileExtensions[] = {
     //".msh2xml", exec // Windows shell
     //".mshxml", exec // Windows
     //".msi", exec  // Windows installer
+    //".msix", exec
+    //".msixbundle", exec
     //".msp", exec  // Windows installer
     //".mst", exec  // Windows installer
     ".ndif",            // Mac disk image
diff --git a/xpcom/io/nsLocalFileCommon.cpp b/xpcom/io/nsLocalFileCommon.cpp
index 32aca20a36fc..f6eabf2d0f02 100644
--- a/xpcom/io/nsLocalFileCommon.cpp
+++ b/xpcom/io/nsLocalFileCommon.cpp
@@ -42,6 +42,8 @@ const char* const sExecutableExts[] = {
   ".app",         // executable application
   ".application", // from bug 348763
   ".appref-ms",   // ClickOnce link
+  ".appx",
+  ".appxbundle",
   ".asp",
   ".atloc",       // Appletalk Location
   ".bas",
@@ -96,6 +98,8 @@ const char* const sExecutableExts[] = {
   ".msh2xml",     // Microsoft Shell
   ".mshxml",      // Microsoft Shell
   ".msi",
+  ".msix",
+  ".msixbundle",
   ".msp",
   ".mst",
   ".ops",         // Office Profile Settings
diff --git a/xpcom/io/nsLocalFileCommon.h b/xpcom/io/nsLocalFileCommon.h
index 7857b2d7b70e..3db0ac9e89ab 100644
--- a/xpcom/io/nsLocalFileCommon.h
+++ b/xpcom/io/nsLocalFileCommon.h
@@ -8,9 +8,9 @@
 #define _NS_LOCAL_FILE_COMMON_H_
 
 #ifdef MOZ_ESR
-extern const char* const sExecutableExts[103];
+extern const char* const sExecutableExts[107];
 #else
-extern const char* const sExecutableExts[104];
+extern const char* const sExecutableExts[108];
 #endif
 
 #endif