firefoxmonomoonlight
Even after I've installed all the Mono packages, I am still asked to install Silverlight when I visit Silverlight-enabled web pages.
Even after I agreed to do this and installed the Moonlight Firefox extension from http://go-mono.com/moonlight/, nothing changed – Silverlight applets still don't work and ask to install Silverlight (directing to http://go-mono.com/moonlight/).
How do I finally install it?
The situation is the same in Ubuntu 10.10 and Xubuntu 11.04.
I would advise removing the Ubuntu Tweak PPA from your software sources by opening the Software Centre then clicking Edit->Software Sources.... Click the 'Other Software' tab then untick the Ubuntu Tweak PPA.
Close the software sources window and it should refresh your software index.
Uninstall any flash plugins you have installed then install ubuntu-restricted-extras. This should get flash working again.
In the future do not use PPAs unless you are certain of what you are doing. Note that Ubuntu Tweak is for users who know what they are doing and can mess up your system if you use it without precautions.
“We have abandoned Moonlight.
Silverlight has not gained much adoption on the web, so it did not become the must-have technology that I thought would have to become. And Microsoft added artificial restrictions to Silverlight that made it useless for desktop programming.“ - Xamarin
You can download this novell-moonlight-39903-x86_64.xpi file, then right click and open with Firefox. This will install moonlight. Click install. That's it..
Best Answer