diff --git a/app/scripts/fetch_xulrunner b/app/scripts/fetch_xulrunner
index a1aced6103..b90c0003d9 100755
--- a/app/scripts/fetch_xulrunner
+++ b/app/scripts/fetch_xulrunner
@@ -82,7 +82,7 @@ function remove_line {
 		egrep -v "$pattern" "$file" > "$file.tmp"
 		mv "$file.tmp" "$file"
 	else
-		echo "$pattern" not found in "$infile" -- aborting 2>&1
+		echo "$pattern" not found in "$file" -- aborting 2>&1
 		exit 1
 	fi
 }
@@ -164,6 +164,9 @@ function modify_omni {
 	# Disable unwanted components
 	remove_line '(RemoteSettings|services-|telemetry|Telemetry|URLDecorationAnnotationsService)' components/components.manifest
 	
+	# Do not trigger LoginManager event that logs an error on autocomplete submission
+	remove_line 'DOMInputPasswordAdded: \{\},' modules/ActorManagerParent.sys.mjs
+	
 	# On Mac/Linux, ignore relative paths in PATH in Subprocess.pathSearch(), used when a bare command is passed to Utilities.Internal.subprocess()
 	if [[ $platform != win* ]]; then
 		replace_line 'let path = PathUtils.join\(dir, bin\);' 'if (!dir.startsWith("\/")) continue; let path = PathUtils.join(dir, bin);' modules/subprocess/subprocess_unix.sys.mjs