However, the SeaMonkey web browser has to be modified in order to run the Microsoft ActiveX control. For example, the Windows software uses Microsoft ActiveX control to run the website. Since both versions of the software are built by the same developer, they have to go through some technical differences before downloading the software. At the same time, they have continued to develop SeaMonkey to work on both the Windows and Linux operating systems. However, since the Windows operating system was discontinued from the market, the developers have changed the website from free to a paid application. This was because, in the past, the developers of the SeaMonkey web browser has used the free versions of the Windows operating system to build their website. The fact that the free version of the Windows operating system is not compatible with the Linux operating system, commonly known as the Linux operating system, is an important issue for the users and developers of the SeaMonkey software.