diff --git a/.hgtags b/.hgtags
index d6617830abe9..425d5648bb93 100644
--- a/.hgtags
+++ b/.hgtags
@@ -283,3 +283,4 @@ fc01df84fa6d91b9dabb4b608eb947cef3230871 FIREFOX_NIGHTLY_120_END
 2506788ad1107aedfe4a7e67b5cc9a6b6779912b FIREFOX_NIGHTLY_122_END
 6b4a069fe37d2413229dda3b61ccaf7b8f3a5f5d FIREFOX_BETA_123_BASE
 4ef3a0b2e8cd48a60eed95f8ba15e13ee48432af FIREFOX_NIGHTLY_123_END
+2af34b4c9adf8c8defd3251b569af9c38cc0a429 FIREFOX_BETA_124_BASE