Force a specific page to load with a specific size

how to expand browser window

Real window size

Can't read the extension settings when using in Opera

user agent string

when i try used 320x568 don´t work

Let me know what the current size is

I activited my license but Chrome still isn't letter the resizer resize

Is it possible to add a new windowsizes, so I can use them more often?

enter new windowsize is difficult