diff --git a/.hgtags b/.hgtags
index c9ced26d466a..e560035f8a3e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4233,3 +4233,4 @@ f6d0f0798c23332170a4a29fa59562a4f2639c9a FIREFOX-ANDROID_128_0b2_RELEASE
 58a7e32914a4e0287439958933bbf31df383ee53 FIREFOX-ANDROID_128_0b4_RELEASE
 58a7e32914a4e0287439958933bbf31df383ee53 DEVEDITION_128_0b4_RELEASE
 58a7e32914a4e0287439958933bbf31df383ee53 FIREFOX_128_0b4_RELEASE
+2731911d2a7f138a3d7807e2413eb3941ccec46c DEVEDITION_128_0b5_BUILD1