A list of Protein Explorer-compatible browsers is below.
 
Netscape 7.1 or later (or current versions of Mozilla or FireFox) (Windows only): Supports all of PE's capabilities. Requires manual installation of the MDL Chime plugin. Download the current version from netscape.com (or mozilla.org or getfirefox.com). See also Protein Explorer's implementation for these browsers. Thanks are due Enrique Castro (Universidad de Las Palmas de Gran Canaria) who solved the key compatibility issues.

Netscape Communicator 4.5-4.8: (Windows or Apple Macintosh): Supports all of PE's capabilities. Automatic installation of MDL Chime. Download 4.8x from www.netscape.com. Do not get version 6. Although Netscape does not mention it, 4.8 works just fine in Windows ME and XP, and in OS X:Classic (see Tips and Techniques for OS X). Under Tools in the left column, click on Browser Central. There, click on Product Archive. If Netscape has changed their site since this was written in early 2005, you may have to look around their site in order to find Netscape 4.8x. Look for the newest version in the 4.8 series, "4.8x". (For example, 4.81 would be later than 4.8). When asked to "Choose Component", the "base" is smaller than the "complete" download. Either is sufficient.

Internet Explorer (Windows only): PE's Features of the Molecule control panel does not work (details) in Internet Explorer, but everything else does. Automatic installation of MDL Chime. To update, start Internet Explorer. In Internet Explorer, open the Tools menu at the very top, and click on Windows Update. Thanks are due Paul Pillot and Jean-Philippe Demers who volunteered key contribitions making PE work in IE.

If you wish to test running Protein Explorer in your current browser even if we don't think it will run, you can (not recommended). You may not recognize whether Protein Explorer is operating properly unless you have experience with it in a fully compatible browser.
 

Browser downloading instructions are above at the top of this page.