A personal and Java blog, likely only for me

Webinar Confirmation: Java, Ubuntu and browsers hell


Hello Javier,

Your registration is confirmed for the webinar… We are looking forward to having you join us.


To help maximize your webinar experience we recommend that you join a test meeting before the session to check your system and browser compatibility at

Let’s try…

Java is not working.

Java is not working.


Now I have to waste half an hour for discovering the problem and solve it.

Let’s see, How do I use Java with the Google Chrome browser?

Chrome and Linux
Starting with Chrome version 35, NPAPI (Netscape Plug-in API) support was removed for the Linux platform. For more information, see Chrome and NPAPI (

Firefox is the recommended browser for Java on Linux.

No problem, let’s use Firefox. But…

Expired or not-yet-valid certificate

Java Security

Sometimes I miss Windows and its closed environment.

Don’t give up. In the error page, the details shows the Java Console:

Java Console screenshot

Java Plug-in

And the more information link leads to the instructions to handle the Java Security via the Control Panel. Including a link to the configuration of the Exception Site List.


Find the Java Control Panel
» Windows
» Mac OS X

Where is the Java Control Panel on Linux?!!! :|

Keep calm and open the Terminal:

Now, you can follow the instructions:

Java Control Panel

Java Control Panel

Go to the Security tab:

Java Control Panel: Security tab

Java Control Panel: Security tab

Press Edit Site List…

Exception Site List

Exception Site List

Add the location:

Exception Site List: add URL

Exception Site List: add URL

Ok. Ok.

Now re-try:

I'm really tired

I’m really tired

I’ve spent too much time with you, so I accept the risk :(



Piece of cake.

It’s been fun and annoying at the same time.

Author: Javier (@jbbarquero)

Java EE developer, swim addict, occasional videogames player, fan of Ben Alex and Shamus Young, and deeply in love with my wife. Sooner or later I'll dedicate a post to expand this simple introduction.

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