Since jMsngr is written in java it can run under any OS supported by java.
Launching browser has been tested on a number of different operating systems and Java virtual machines.Note that the code will only run under JDK 1.1 or later in all environments due to its dependence on reflection.
Macintosh:
Should support: All systems with the Internet Scripting AppleScript dictionary installed in the Scripting Additions folder in the Extensions folder, which is part of the default installation for Mac OS 8.0 and 8.1, or all systems in which the Finder can handle a GetURL event by default, which is true for Mac OS 8.5 and later. Any system that matches those requirements must also have the Macintosh Runtime for Java 2.0 or later installed, which is true for Mac OS 8.1 and later (possibly 8.0).
Specifically tested on: Mac OS 8.0, 8.1, 8.5.1, and 8.6; MRJ 2.0, 2.1.2, and 2.2ea1.
Windows : Should support: All Windows 95, 98, and NT systems
Specifically tested on: Windows 98 and NT with IE 4.0 and Netscape 4.6.1.
Unix : Should Support : All system with Netscape installed.