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

YES!

I recommend avoiding extensions, master chrome dev tools with keyboard shortcuts.

Open them using
F12
or
ctrl+shift+i(Gnu/Linux or Windows)
cmd+opt+i(Mac)
or
Menu > Tools > Developer Tools

EDIT: Screenshots updated to reflect chrome dev tools recent changes.

A gif says it better!

(hint: open image in new tab)