I'm trying to design a view in Canvas.  I am testing in a tab with a desktop view, and another tab (on my same desktop/IP) with a responsive view of an iphone.  Every time I refresh, it boots me out of the previously used tab.

If I forget to refresh the screen with the Canvas editor, it will stall out and it also has the potential for data loss.

Suggestion:

Improve detection and do not boot/cause refresh of editors etc when previewing in an emulated browser.