When I try to open a flash site or Java applet, Firefox tells me that there are some missing plugins available.
But once i click on that button of the top bar, Firefox doesn't find anything. Only manual install is then available.
I remember that in previous versions of Ubuntu, Firefox recognized automatically all plugins and installed them trough apt etc...
Is this a bug? Only me with this problem here? Because for new users this is an important feature!
ps. the Ubufox extension is still installed
I don't know whether previous versions of Ubuntu installed Flash automatically, but I doubt it. In any case, there's this answer: How can I install Adobe Flash player? You can also use Software Center instead of Synaptic.
For the Java plugin, search for "Java plugin" in Software Center or Synaptic, and you will find the Icedtea Java Plugin.