Rochus

Solved with Firefox 71

This setting also slows down Firefox first website load by 5 seconds. Followup websites load fast. Disabled kl_prefs_62fbb8f7_c917_4cf7_957a_aad2b8fa768c.js and Firefox loads fast also on first website.https://bugzilla.mozilla.org/show_bug.cgi?id=1591691