In Firefox 17 on Ubuntu 12.04, I cannot get the Java verification applet to work (needless to say I cannot get any Java applications on the browser working).
I already tried uninstalling and re-installing the AFAIK necessary components (screenshot 1, screenshot 2) (before, I had Java 6 AND 7 installed. I already tried leaving only Java 7, now I am back to leaving only Java 6), but I cannot get it to work.
How do I get JRE up and running in firefox?
UPDATE: I had so much trouble with Java in Firefox quitting working after upgrades etc that I gave up Firefox entirely (my main purpose of using this Ubuntu machine is to safely run Java apps away from my main computer). I now run Opera and never had any problems again - it comes with Java and it just works.