Chrome Version       : 61.0.3163.79
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari 5:
  Firefox 4.x:
     IE 7/8/9:

What steps will reproduce the problem?
1. Set a localStorage item to a string 5+ MB long
2. Try to view localStorage in devtools
3. Resize columns (or do anything else)

What is the expected result?
A quick response

What happens instead of that?
Multi-second freezes.

Please provide any additional information below. Attach a screenshot if
possible.

UserAgentString: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36 OPR/48.0.2685.26 (Edition beta)