RNAComposer is designed to work with most of the available web browsers. The latest versions of browsers are strongly recommended.

Operating system	Recommended browser
Windows	Microsoft Internet Explorer (8.0 and later), Mozilla Firefox (3.6 and later), Opera (10.53 and later) or Google Chrome (5.0 and later)
Linux	Mozilla Firefox (3.6 and later), Opera (10.53 and later)
Mac	Mozilla Firefox (3.6 and later), Opera (10.53 and later)