L2-Cache (pro Kern):	256 KB
 L3-Cache:	8 MB

OK, it seems this is still o constant problem for different version, even different browsers! So im going to post this only ONCE HERE and a copy at a similar forum for chrome! The problems are the same as described here: https://bugzilla.mozilla.org/show_bug.cgi?id=914355 https://bugzilla.mozilla.org/show_bug.cgi?id=616117 https://support.mozilla.org/de/questions/746499 A solution may be: https://developers.google.com/web/updates/2016/07/infinite-scroller Im getting the problem with tumblr, slowing down/eve freezes for over 30 seconds then I get the "script not answering warning" (see attachement). As i have: iMac13,2 Intel Core i7 3,4 GHz CPU 1 Cores: 4 L2-Cache (pro Kern): 256 KB L3-Cache: 8 MB RAM: 24 GB 3 Tera Fusion Drive (I first thought this may give troubles but as there are other users with different PCs with the same problem...) Firefox 50.1.0 Chrome Version 55.0.2883.95 (64-bit) As Firefox/Chrome are not crashing (just freezing (FF) or crashing the page (Chrome)) there is no crash report, so dont even ask please. As I couldn't solve the problem with tips/tricks/recommendations, please dont give me anymore advices. I just want to report this because I think its a "bigger" problem for a lot of different users.