diff --git a/.hgtags b/.hgtags
index b05ea3d0e..68b4af397 100644
--- a/.hgtags
+++ b/.hgtags
@@ -2048,3 +2048,5 @@ c69e080694068b5ef33ddb5e88ef7f96a5708c63 THUNDERBIRD_10_0_12esr_RELEASE_RUNTIME
 c69e080694068b5ef33ddb5e88ef7f96a5708c63 THUNDERBIRD_10_0_12esr_BUILD2_RUNTIME
 04aa89fdba6da504bc8525779c3b58fdf81d4697 THUNDERBIRD_17_0_2_RELEASE_RUNTIME
 04aa89fdba6da504bc8525779c3b58fdf81d4697 THUNDERBIRD_17_0_2_BUILD1_RUNTIME
+c9aced7f0b7d1fee8af2906a1cc48acf644a8b7e FIREFOX_17_0_2esr_RELEASE_RUNTIME
+c9aced7f0b7d1fee8af2906a1cc48acf644a8b7e FIREFOX_17_0_2esr_BUILD2_RUNTIME