Warning Window

[Richard Barmann]

Is the following a Kubuntu problem or a Firefox problem. This is 
recurring several times a day. How can I eliminate it? I am using 
Kubuntu 16.04 and Firefox 46.0. I continually get a window that says 
Firefox needs to restore.

"A script on this page may be busy, or it may have stopped responding. 
You can stop the script now, open the script in the debugger, or let the 
script continue.

Script: http://secure-ds.serving-sys.c…urstingScript/SZMKFLVPAIDBR.js:9";