diff --git a/.hgtags b/.hgtags
index fb0245d14024..590c28e16505 100644
--- a/.hgtags
+++ b/.hgtags
@@ -146,3 +146,4 @@ ccfd7b716a91241ddbc084cb7116ec561e56d5d1 FIREFOX_BETA_61_BASE
 9b74b9f2939a7ae3a0ea6e711dc32ed5203e03ff FIREFOX_BETA_62_BASE
 4f6e597104dabedfecfafa2ab63dc79fd7f8bc7a FIREFOX_NIGHTLY_62_END
 190b827aaa2b5e6fb9af7a0defb238ccc35f8b9e FIREFOX_BETA_63_BASE
+034c5ef24e98b0ce85fa849face079f568eb397c FIREFOX_NIGHTLY_63_END