diff --git a/.gitignore b/.gitignore
index ee8e24679e42..b409ec583766 100644
--- a/.gitignore
+++ b/.gitignore
@@ -189,3 +189,7 @@ config/external/icu4x
 
 # Ignore the index files generated by clangd.
 .cache/clangd/index/
+
+# Ignore Storybook generated files
+browser/components/storybook/node_modules/
+browser/components/storybook/storybook-static/
diff --git a/.hgignore b/.hgignore
index 4fe379b8da3e..44b8b935bd93 100644
--- a/.hgignore
+++ b/.hgignore
@@ -157,7 +157,6 @@ _OPT\.OBJ/
 ^tools/browsertime/node_modules/
 ^tools/lint/eslint/eslint-plugin-mozilla/node_modules/
 ^browser/components/newtab/node_modules/
-^browser/components/storybook/node_modules/
 
 # Ignore talos virtualenv and tp5n files.
 # The tp5n set is supposed to be decompressed at
@@ -243,3 +242,7 @@ toolkit/components/certviewer/content/package-lock.json
 
 # Ignore mypy files
 \.mypy_cache/
+
+# Ignore Storybook generated files
+^browser/components/storybook/node_modules/
+^browser/components/storybook/storybook-static/