diff --git a/.hgtags b/.hgtags
index 8dd518916748..f22d634369a8 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5102,3 +5102,4 @@ c685d5844a0e4f99ac535b6ffc641fbd07696c68 FIREFOX_128_8_0esr_RELEASE
 76f59a9f2161a539a9b6b000fcb7205e8d007b11 FIREFOX_128_9_0esr_BUILD1
 d156a4452c9d41aa78724265e41c26b7ff76941a FIREFOX_128_8_1esr_BUILD2
 d156a4452c9d41aa78724265e41c26b7ff76941a FIREFOX_128_8_1esr_RELEASE
+3aaf665616b3c0f61839d40a02a9f7ae8778b04c FIREFOX_128_9_0esr_BUILD2