I understand that do to the security issues of Java 7 update 10 that Firefox blocked all Java usage, but since update 11 fixes these issues, when will Firefox unblock Java usage. I have already installed update 11 for java.
If your java is outdated then its disabled, enable your java plugin
Firefox Menu > Tools > Addons > Plugins
Check whether your java is upto date or not.
In the article it shows the plug in symbol in the address bar; I don't even see that when I try to enable Java. I really hope they fix all this soon!
FF "announced" that I needed to update/reset. I did so - it killed all (ALL) of my add-ons without telling me it was going to - very aggravating. FF 22 also killed all Java on all sites. I checked the add-ons under tools - according to that, it was enabled. Just in case, I reinstalled the latest Java - still nothing. Now I cannot view any pictures on any site at all, nothing but text.
To avoid confusion:
Clear the cache and the cookies from websites that cause problems.
"Clear the Cache":
"Remove Cookies" from sites causing problems:
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).