Not sure if it's here or IFSJA but this popup keeps showing up along with a ton of errors and I'm running Linux so it's not a windows thing.
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://b.scorecardresearch.com/rs/vce_st.js:1