Dev Live Browser Bookmarks

Make a new bookmark in your browser’s topbar. Right-click to edit bookmark. Copy & Paste snippet into URL field. Title bookmark. Save.

Cache:

javascript:void(location.href=location.href.substring(0,location.href.lastIndexOf('?')) + '?cache=0');

DEV:

javascript:void(location.href=location.href.substring(0,location.href.lastIndexOf('?')) + '?cache=0&dev_template=1&dev_content=1');

LIVE:

javascript:void(location.href=location.href.substring(0,location.href.lastIndexOf('?')) + '?cache=0&dev_template=0&dev_content=0');