diff --git a/browsers/private/update-tool/index.mts b/browsers/private/update-tool/index.mts
index 9cdf988..73140b7 100644
--- a/browsers/private/update-tool/index.mts
+++ b/browsers/private/update-tool/index.mts
@@ -108,12 +108,7 @@ async function downloadMilestonesAndWriteVersionsFiles({
   }
 
   const allVersions = [...Object.keys(versions)];
-
-  // Since 136.0 firefox in RBE causes `Protocol error (session.new): Target closed` errors
-  // This can be tested/debugged via `pnpm bazel test //packages/core/test/acceptance/selectorless:selectorless_web_firefox  --config=remote --google_default_credentials`
-  // in the angular/angular repo.
-  const defaultVersion =
-    browser === 'firefox' ? '135.0' : allVersions[allVersions.length - 1];
+  const defaultVersion = allVersions[allVersions.length - 1];
 
   // Write both the JSON and the `.bzl` file. They both contain the same
   // versions list. The `.bzl` file just has some additional syntax.
diff --git a/browsers/private/versions/firefox.bzl b/browsers/private/versions/firefox.bzl
index e6af1d0..ce959c9 100644
--- a/browsers/private/versions/firefox.bzl
+++ b/browsers/private/versions/firefox.bzl
@@ -3,7 +3,7 @@
 DO NOT EDIT. Generated by //browsers/private/update-tool:update-tool.
 """
 
-DEFAULT_VERSION = "135.0"
+DEFAULT_VERSION = "143.0"
 
 VERSIONS = {
     "129.0": {