[this-pony]

Maybe this can be solved on the browser side of things. I can imagine that a browser could communicate the width of the screen as the width of the window to the webpage, even though the width of the window in reality might be made smaller by the user.

[taylodl]

Imagine having a "lock layout" button on your toolbar. Once locked, the browser would continue reporting the window width as being what it was when the layout was locked - regardless of window resizing. I think this is a great idea!

[this-pony]

Indeed!, that is exactly what I had in mind.