--- firefox-93.0/modules/libpref/init/all.js~	2021-10-06 00:00:30.000000000 +0200
+++ firefox-93.0/modules/libpref/init/all.js	2021-10-06 09:47:55.616984455 +0200
@@ -216,6 +216,11 @@
 pref("security.crash_tracking.js_load_1.prevCrashes", 0);
 pref("security.crash_tracking.js_load_1.maxCrashes", 0);
 
+// Lower from 4 to 2 due to extension problems on glibc 2.34
+// https://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2021-October/026375.html
+// https://wiki.mozilla.org/Security/Sandbox#Content_Levels
+pref("security.sandbox.content.level", 2);
+
 pref("general.useragent.compatMode.firefox", false);
 
 pref("general.config.obscure_value", 13); // for MCD .cfg files
--- firefox-93.0/browser/app/profile/firefox.js~	2021-10-06 09:50:42.000000000 +0200
+++ firefox-93.0/browser/app/profile/firefox.js	2021-10-06 19:19:15.409293732 +0200
@@ -1233,7 +1233,10 @@
   // the sandbox while we fix their problems, or to allow running Firefox with
   // exotic configurations we can't reasonably support out of the box.
   //
-  pref("security.sandbox.content.level", 4);
+// Lower from 4 to 2 due to extension problems on glibc 2.34
+// https://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2021-October/026375.html
+// https://wiki.mozilla.org/Security/Sandbox#Content_Levels
+  pref("security.sandbox.content.level", 2);
   // Introduced as part of bug 1608558.  Linux is currently the only platform
   // that uses a sandbox level for the socket process.  There are currently
   // only 2 levels: