--- a/browser/config/mozconfigs/win32/common-opt
+++ b/browser/config/mozconfigs/win32/common-opt
@@ -16,17 +16,10 @@ ac_add_options --with-mozilla-api-keyfil
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1
 
 . $topsrcdir/build/win32/mozconfig.vs-latest
 
-# Enable Adobe Primetime CDM on 32-bit Windows in Mozilla builds.
-# Enabled here on the assumption that downstream vendors will not be using
-# these build configs.
-# Note: Widevine is automatically enabled by the build, and can be
-# disabled with -widevine.
-ac_add_options --enable-eme=+adobe
-
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1

--- a/browser/config/mozconfigs/win64/common-opt
+++ b/browser/config/mozconfigs/win64/common-opt
@@ -15,17 +15,10 @@ ac_add_options --with-mozilla-api-keyfil
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1
 
 . $topsrcdir/build/win64/mozconfig.vs-latest
 
-# Enable Adobe Primetime CDM on 64-bit Windows in Mozilla builds.
-# Enabled here on the assumption that downstream vendors will not be using
-# these build configs.
-# Note: Widevine is automatically enabled by the build, and can be
-# disabled with -widevine.
-ac_add_options --enable-eme=+adobe
-
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1