Chrome Version:55.0.2883.11 709e70a37ad5ea7e4155b38134d00530605f11bb-refs/branch-heads/2883@{#79} (32/64-bit)
OS:Windows (7,8,10), Mac (10.10.5, 10.11.5), Linux (14.04 LTS)
URL:https://chrome.google.com/webstore/detail/manyland/geieilhcelplmpfhepdoggckhmfaanmp?hl=en-GB

What steps will reproduce the problem?
(1)Launch chrome and install 'manyland' app from above url.
(2)After loading the page, press ctrl+ P for print preview and ct++ for zooming the page,Observe

Actual: Keyboard shortcut ctrl+p and ctrl++ doesn't work for manyland app.

Expected: Keyboard shortcut ctrl+p and ctrl++ should work for manyland app.

This is a Non-regression issue seen from 'M30' series i.e chrome version 30.0.1549.1