diff --git a/.hgtags b/.hgtags
index 8ef9cadf167a7..5d1e9c68dbe1d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -196,3 +196,4 @@ cb4114308a0ebb785c98cb76cb412400bd75434c FIREFOX_BETA_83_BASE
 50f3cb8be9aa13d834ffea74b4a4618d2c9a030b FIREFOX_BETA_83_BASE
 50f3cb8be9aa13d834ffea74b4a4618d2c9a030b FIREFOX_BETA_83_BASE
 fc6d20cf008c2ca66d2c45439690d2ff067bf1b9 FIREFOX_BETA_83_BASE
+6d98cc745df58e544a8d71c131f060fc2c460d83 FIREFOX_NIGHTLY_83_END