diff --git a/browser_patches/firefox/BUILD_NUMBER b/browser_patches/firefox/BUILD_NUMBER
index ca298e35de..fd1f63c243 100644
--- a/browser_patches/firefox/BUILD_NUMBER
+++ b/browser_patches/firefox/BUILD_NUMBER
@@ -1 +1 @@
-1084
+1085
diff --git a/browser_patches/firefox/preferences/playwright.cfg b/browser_patches/firefox/preferences/playwright.cfg
index f974712155..7b8fc256e4 100644
--- a/browser_patches/firefox/preferences/playwright.cfg
+++ b/browser_patches/firefox/preferences/playwright.cfg
@@ -249,5 +249,8 @@ lockPref("toolkit.crashreporter.enabled", false);
 pref("toolkit.telemetry.enabled", false);
 pref("toolkit.telemetry.server", "");
 
+// Disable downloading the list of blocked extensions.
+pref("extensions.blocklist.enabled", false);
+
 // Disable crash reporter.
 Components.classes["@mozilla.org/toolkit/crash-reporter;1"].getService(Components.interfaces.nsICrashReporter).submitReports = false;