UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.113 Safari/537.36

Steps to reproduce the problem:
1. Install extension from the "extension.zip" file
2. Open the main.html from the "testPage.zip" file
3. Run GC
4. Take a heap snapshot
5. Click on "Run!" in the page
6. Run GC
7. Take a heap snapshot

What is the expected behavior?
Memory heap should not be affected

What went wrong?
Memory increased from 3.4mb to 22.6mb
Although that all iframes where removed, no content-scripts were leftovers

WebStore page: Local extension

Did this work before? N/A 

Chrome version: 53.0.2785.113  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 23.0 r0

Please see screenshot
http://screencast.com/t/SiH6xbKdgtwC

It seems that the main cause for this is a string that related to internal extension logic
 

Deleted: testPage.zip 1.1 KB

testPage.zip 1.1 KB Download

Deleted: extension.zip 452 bytes

extension.zip 452 bytes Download