diff --git a/.github/actions/spelling/expect.txt b/.github/actions/spelling/expect.txt
index 78ae8476b..3e2f24c72 100644
--- a/.github/actions/spelling/expect.txt
+++ b/.github/actions/spelling/expect.txt
@@ -78,6 +78,7 @@ WCA_ACCENT_POLICY
 HGlobal
 dopusrt
 firefox
+Firefox
 msedge
 svgc
 ime