The IcedTea-Web project is not inherently cross-platform; it is developed on Linux and for Linux, and so it can be built quite easily on popular Linux distributions. The two main parts of it (stored in corresponding directories in the source code repository) are netx and plugin.

NetX is a pure Java implementation of the WebStart technology. We will look at it more thoroughly in the following recipes of this chapter.

Plugin is an implementation of the browser plugin using the NPAPI plugin architecture that is supported by multiple browsers. Plugin is written partly in Java and partly in native code (C++), and it officially supports only Linux-based operating systems. There exists an opinion about NPAPI that this architecture is dated, overcomplicated, and insecure, and that modern web browsers have enough built-in capabilities to not require external plugins. And browsers have gradually reduced support for NPAPI. Despite that, at the time of writing...