Getting Firefox and Java to work with jnlp files

If you are having trouble opening a jnlp file (e.g., for IPMI console access) you can try some of these steps.

Tell Firefox to allow pop-up windows for this site

Tell Firefox how to handle the filetype .jnlp

Tell it to open it with /usr/bin/javaws

Tell Java to allow the site to run applications

If you get “Application Blocked by Java Security” you can fix that by editing an exceptions list.

Modify file ~/.java/deployment/security/exception.sites

Each line in this file should be a protocol and domain name or IP address for the exception, e.g.:

http://172.20.0.19
http://172.20.0.20

References

1. https://java.com/en/download/faq/java_webstart.xml
2. https://stackoverflow.com/questions/25949651/openjdk-how-to-add-site-to-exception-list#25950032

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