diff --git a/.hgtags b/.hgtags
index 21a2b940a9bf..b6e27b56f20c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5087,3 +5087,4 @@ e0c969a3bfc0a23219384269e5b36a589c8f6cc5 FIREFOX_128_3_1esr_BUILD1
 e0c969a3bfc0a23219384269e5b36a589c8f6cc5 FIREFOX_128_3_1esr_RELEASE
 c4a5d008ee64fab523384408fa2868e2d028025d FIREFOX_128_4_0esr_BUILD1
 c4a5d008ee64fab523384408fa2868e2d028025d FIREFOX_128_4_0esr_RELEASE
+68352da82b95d7114af99b268c179195fd2fead0 FIREFOX_128_5_0esr_BUILD1