diff --git a/.prettierignore b/.prettierignore
index 84e246aed8a8..5d7f26eb2b8b 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1464,6 +1464,7 @@ toolkit/content/vendor/react/
 toolkit/content/widgets/vendor/lit.all.mjs
 toolkit/crashreporter/breakpad-client/
 toolkit/crashreporter/google-breakpad/
+toolkit/modules/third_party/
 tools/fuzzing/libfuzzer/
 tools/profiler/core/vtune/
 xpcom/build/mach_override.c
diff --git a/tools/rewriting/ThirdPartyPaths.txt b/tools/rewriting/ThirdPartyPaths.txt
index 3a638ca2fc12..91fbd0960a18 100644
--- a/tools/rewriting/ThirdPartyPaths.txt
+++ b/tools/rewriting/ThirdPartyPaths.txt
@@ -203,6 +203,7 @@ toolkit/content/vendor/react/
 toolkit/content/widgets/vendor/lit.all.mjs
 toolkit/crashreporter/breakpad-client/
 toolkit/crashreporter/google-breakpad/
+toolkit/modules/third_party/
 tools/fuzzing/libfuzzer/
 tools/profiler/core/vtune/
 xpcom/build/mach_override.c