When trying to load a java “jar” (.jnlp) file from Java Web browser plugin hang at x% and never complete.
This is a common issue and require clearing the IcedTea Web cache.
1. Clear your Web browser cache and close it ;
2. Clear the IcedTea cache using the following command :
rm -rf ~/.cache/icedtea-web/cache/*
Then open your browser again and it should now load properly.