diff --git a/.hgtags b/.hgtags
index 18b3e317309cf..7a55f014c2863 100644
--- a/.hgtags
+++ b/.hgtags
@@ -203,3 +203,4 @@ de82276dbe0fc291c5d9526a7dbc1b736010873a FIREFOX_BETA_85_BASE
 22fc47c968f29a47ed15b282e2148aa5024d861e FIREFOX_NIGHTLY_85_END
 fddc94978eb7f42cca5d199b94164d133facc3e7 FIREFOX_BETA_86_BASE
 c2587d0631380f8479d44d4759ab820ac2c1a241 FIREFOX_NIGHTLY_86_END
+c27aac8c84b70e3611b04fc56927719419aefc64 FIREFOX_BETA_87_BASE