diff --git a/.hgtags b/.hgtags
index 6220cd60dff4..c7282d8df651 100644
--- a/.hgtags
+++ b/.hgtags
@@ -135,3 +135,4 @@ f80dc9fc34680105b714a49b4704bb843f5f7004 FIREFOX_AURORA_53_BASE
 f9605772a0c9098ed1bcaa98089b2c944ed69e9b FIREFOX_BETA_55_BASE
 320642944e42a889db13c6c55b404e32319d4de6 FIREFOX_BETA_56_BASE
 8e818b5e9b6bef0fc1a5c527ecf30b0d56a02f14 FIREFOX_BETA_57_BASE
+f7e9777221a34f9f23c2e4933307eb38b621b679 FIREFOX_NIGHTLY_57_END