diff --git a/common/repositories.bzl b/common/repositories.bzl
index c1efddb0dd0be..976ce80c9c46c 100644
--- a/common/repositories.bzl
+++ b/common/repositories.bzl
@@ -50,8 +50,8 @@ js_library(
 
     http_archive(
         name = "linux_beta_firefox",
-        url = "https://ftp.mozilla.org/pub/firefox/releases/139.0b3/linux-x86_64/en-US/firefox-139.0b3.tar.xz",
-        sha256 = "8db541819ed4c06678e1678715c0d3f2cc43fba21c593dfc6a5f10c7674e98af",
+        url = "https://ftp.mozilla.org/pub/firefox/releases/139.0b4/linux-x86_64/en-US/firefox-139.0b4.tar.xz",
+        sha256 = "21bfb99fe445e64ad8fb86822fd6d77c9c0d387530b787f3c3fc99b97723d664",
         build_file_content = """
 load("@aspect_rules_js//js:defs.bzl", "js_library")
 package(default_visibility = ["//visibility:public"])
@@ -72,8 +72,8 @@ js_library(
 
     dmg_archive(
         name = "mac_beta_firefox",
-        url = "https://ftp.mozilla.org/pub/firefox/releases/139.0b3/mac/en-US/Firefox%20139.0b3.dmg",
-        sha256 = "a7433bb645cbef9dd123afe8856060dbf6afaa1bab06d14298ebbc7d35968984",
+        url = "https://ftp.mozilla.org/pub/firefox/releases/139.0b4/mac/en-US/Firefox%20139.0b4.dmg",
+        sha256 = "c61d0fe161c6cb778a3e564f4cffa70cc7fb6bb5770586fa66c7db8ab9c31cf1",
         build_file_content = """
 load("@aspect_rules_js//js:defs.bzl", "js_library")
 package(default_visibility = ["//visibility:public"])