--- a/mail/app/profile/all-thunderbird.js
+++ b/mail/app/profile/all-thunderbird.js
@@ -759,8 +759,11 @@ pref("browser.search.order.1", "chrome:/
 pref("browser.search.order.2", "chrome://messenger-region/locale/region.properties");
 pref("browser.search.order.3", "chrome://messenger-region/locale/region.properties");
 
 // XXX Don't update yet, until we've verified how that affects us.
 pref("browser.search.update", false);
 
 // Check whether we need to perform engine updates every 6 hours
 pref("browser.search.update.interval", 21600);
+
+// Disable remote debugging protocol logging
+pref("devtools.debugger.log", false);