diff --git a/browser_patches/firefox-beta/BUILD_NUMBER b/browser_patches/firefox-beta/BUILD_NUMBER
index ed3779dd0f..d2b3483b18 100644
--- a/browser_patches/firefox-beta/BUILD_NUMBER
+++ b/browser_patches/firefox-beta/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1325
-Changed: lushnikov@chromium.org Thu May 19 17:56:07 +03 2022
+1326
+Changed: lushnikov@chromium.org Tue May 31 10:19:28 +03 2022
diff --git a/browser_patches/firefox-beta/build.sh b/browser_patches/firefox-beta/build.sh
index 4fcc6a4069..12d8ca26cb 100755
--- a/browser_patches/firefox-beta/build.sh
+++ b/browser_patches/firefox-beta/build.sh
@@ -109,7 +109,7 @@ if [[ $1 == "--juggler" ]]; then
 elif [[ $1 == "--bootstrap" ]]; then
   ./mach configure
 else
-  ./mach build
+  MOZ_AUTOMATION=1 MOZ_FETCHES_DIR=$HOME/.mozbuild ./mach build
   if is_mac; then
     node "${SCRIPT_FOLDER}"/install-preferences.js "$PWD"/${OBJ_FOLDER}/dist
   else