diff --git a/PKGBUILD b/PKGBUILD
index 27b91cc..e4b10ac 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -129,6 +129,13 @@ fi
   # this one only to remove an annoying error message:
   sed -i 's#SaveToPocket.init();#// SaveToPocket.init();#g' browser/components/BrowserGlue.jsm
 
+  # Remove Internal Plugin Certificates
+  _cert_sed='s#if (aCert.organizationalUnit == "Mozilla [[:alpha:]]\+") {\n'
+  _cert_sed+='[[:blank:]]\+return AddonManager\.SIGNEDSTATE_[[:upper:]]\+;\n'
+  _cert_sed+='[[:blank:]]\+}#'
+  _cert_sed+='// NOTE: removed#g'
+  sed -z "$_cert_sed" -i toolkit/mozapps/extensions/internal/XPIInstall.jsm
+
   # allow SearchEngines option in non-ESR builds
   sed -i 's#"enterprise_only": true,#"enterprise_only": false,#g' browser/components/enterprisepolicies/schemas/policies-schema.json
 
diff --git a/binary_tarball/scripts/3_Configure_Source_Code.sh b/binary_tarball/scripts/3_Configure_Source_Code.sh
index 2c06643..08d31ed 100755
--- a/binary_tarball/scripts/3_Configure_Source_Code.sh
+++ b/binary_tarball/scripts/3_Configure_Source_Code.sh
@@ -128,5 +128,12 @@ sed -i "s/'pocket'/#'pocket'/g" browser/components/moz.build
 # this one only to remove an annoying error message:
 sed -i 's#SaveToPocket.init();#// SaveToPocket.init();#g' browser/components/BrowserGlue.jsm
 
+# Remove Internal Plugin Certificates
+_cert_sed='s#if (aCert.organizationalUnit == "Mozilla [[:alpha:]]\+") {\n'
+_cert_sed+='[[:blank:]]\+return AddonManager\.SIGNEDSTATE_[[:upper:]]\+;\n'
+_cert_sed+='[[:blank:]]\+}#'
+_cert_sed+='// NOTE: removed#g'
+sed -z "$_cert_sed" -i toolkit/mozapps/extensions/internal/XPIInstall.jsm
+
 # allow SearchEngines option in non-ESR builds
 sed -i 's#"enterprise_only": true,#"enterprise_only": false,#g' browser/components/enterprisepolicies/schemas/policies-schema.json