UserAgent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2758.0 Safari/537.36

Steps to reproduce the problem:
1. install secure shell under latest chrome canary
2. set it to launch in separate window if not default (just in case)
3. launch it, log in to some account and wait few seconds (didn't check if logging in is even required to be honest)

What is the expected behavior?
no Page Unresponsive notification

What went wrong?
Page Unresponsive notification shows up. it can be ignored, terminal works like it did before the latest update, cpu usage basically zero as always. it's just that notification, both confusing and annoying. may imply some problem with the javascript engine - no idea, this is the only situation so far where i've started getting that dialog after the latest update.

WebStore page: https://chrome.google.com/webstore/detail/secure-shell/pnhechapfaindjhompbnflcldabbghjo?utm_source=chrome-ntp-icon

Did this work before? Yes 53.0.2756.0

Chrome version: 53.0.2758.0  Channel: canary
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: disabled