Handling responsive websites in electron webview



I am opening lot of websites in my electron app.
my webview size is only 70% of the screen.Some websites are trying to fit in that 70% space[auto responsive]. Since site is trying to fit is that smaller space few words of that page are accidentally hidden.This is giving very bad user experience.

How to handle those responsive websites.
Sample: www.toywiz.com

If you minimize the webview size, product tittle is hidden by top bar.
If i try to keep webview width as 1200px then few page are moved out of screen and I am not getting horizontal scroll bar.