--- a/browser/locales/en-US/chrome/browser/browser.properties
+++ b/browser/locales/en-US/chrome/browser/browser.properties
@@ -758,11 +758,13 @@ certErrorDetailsCertChain.label = Certif
 # LOCALIZATION NOTE (tabgroups.migration.anonGroup):
 # %S is the group number/ID
 tabgroups.migration.anonGroup = Group %S
 tabgroups.migration.tabGroupBookmarkFolderName = Bookmarked Tab Groups
 
 decoder.noCodecs.button = Learn how
 decoder.noCodecs.accesskey = L
 decoder.noCodecs.message = To play video, you may need to install Microsoft’s Media Feature Pack.
+decoder.noCodecsVista.message = To play video, you may need to enable Microsoft’s Platform Update Supplement for Windows Vista.
 decoder.noCodecsXP.message = To play video, you may need to enable Adobe’s Primetime Content Decryption Module.
 decoder.noCodecsLinux.message = To play video, you may need to install the required video codecs.
 decoder.noHWAcceleration.message = To improve video quality, you may need to install Microsoft’s Media Feature Pack.
+decoder.noHWAccelerationVista.message = To improve video quality, you may need to install Microsoft’s Platform Update Supplement for Windows Vista.