Alternative to Chrome Extension “Window Resizer”

Question

In light of the recent controversy (Dec 2013) over the Chrome extension titled \"Window Resizer\", what are some alternative solutions to quickly resizing the Chrome browser for

Answer 1

To update @Dave's answer, as of Chrome 35.0.1916.153 m, you need to select the Show drawer icon (>=) to the left of the gear icon, select Sources then the Emulation tab.

To get the most current tools go to @FireCodings link to Google's mobile emulation development tools, and download/install Chrome Canary. Then in Canary choose Tools->Developer Tools, click the mobile icon in the top-left corner of the tools window (at the bottom of the browser), click Sources, and then Emulation. The information is there on the Google page link to demonstrate how to use the tools.