diff --git a/testing/firefox/checksums b/testing/firefox/checksums
index 7710c8ed..b3f01a3e 100644
--- a/testing/firefox/checksums
+++ b/testing/firefox/checksums
@@ -1,4 +1,4 @@
-d370344d6bcad69ae242f4364d32221948ee97f8a9f794eb0f6b2151db8af85c  firefox-71.0b11.source.tar.xz
+ecdf3c9b7c20f2369e8855e22a5aa45d3bef9243fe1ad914a8f81a516d1d036a  firefox-71.0b12.source.tar.xz
 f0611136bee505811e9ca11ca7ac188ef5323a8e2ef19cffd3edb3cf08fd791e  autoconf-2.13.tar.gz
 b5e70b12cc9dd18fffd7924a7d3a2e11574136fe0764359d08eba0755f1c5d4c  mozconfig
 960d82bbfdc88c95f5cb4f2e1c1bf23dae7519b3b7203914d7b3ddbff1ba4c28  stab.h
diff --git a/testing/firefox/sources b/testing/firefox/sources
index 50475414..f81f121a 100644
--- a/testing/firefox/sources
+++ b/testing/firefox/sources
@@ -1,4 +1,4 @@
-https://ftp.mozilla.org/pub/firefox/releases/71.0b11/source/firefox-71.0b11.source.tar.xz
+https://ftp.mozilla.org/pub/firefox/releases/71.0b12/source/firefox-71.0b12.source.tar.xz
 https://ftp.gnu.org/gnu/autoconf/autoconf-2.13.tar.gz autoconf2.13/
 files/mozconfig
 files/stab.h toolkit/crashreporter/google-breakpad/src/
diff --git a/testing/firefox/version b/testing/firefox/version
index 776f1b94..fde6365d 100644
--- a/testing/firefox/version
+++ b/testing/firefox/version
@@ -1 +1 @@
-71.0b11 1
+71.0b12 1