Can you confirm that Silverlight is set to "Always Activate" on the Add-ons page?

You can open that using either:

• Ctrl+Shift+a
• orange Firefox button (or Tools menu) > Add-ons

In the left column, click Plugins. Then scroll down and find Silverlight.

Assuming that checks out, then more generally...

When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Bypass Firefox's Cache

Use Ctrl+Shift+r to reload the page fresh from the server.

Alternately, you also can clear Firefox's cache completely using:

orange Firefox button (or Tools menu) > Options > Advanced

On the Network mini-tab > Cached Web Content : "Clear Now"

If you have a large hard drive, this might take a few minutes.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either:

• right-click and choose View Page Info > Security > "View Cookies"
• Alt+t (open the classic Tools menu) > Page Info > Security > "View Cookies"

In the dialog that opens, you can remove the site's cookies individually.

Then try reloading the page. Does that help?

I checked PlugIns and yes Silverlight is set to "Always Activate"

I completely cleared the Cache and all cookies.

Did not fix.

However, I did some more checking and I noticed there was a program in my Add/Remove Programs called "Netflix Movie VIewer". I removed it and then Firefox started working with Netflix !

http://www.shouldiremoveit.com/Netflix-Movie-Viewer-13003-program.aspx

Solution no longer works. The "movie viewer" with that name or anything like it doesn't exist . Netflix tech support doesn't help. It's interesting that MS IE works just fine with MS Silverlight and Netflix..

What does work is the ShouldIRemoveit program. http://www.shouldiremoveit.com/Netflix-Movie-Viewer-13003-program.aspx

I installed and ran it and removed the top recent orange rated new programs. Netflix works fine afterwards. http://www.shouldiremoveit.com/Netflix-Movie-Viewer-13003-program.aspx Thanks Jabailo

I got a black screen everytime I wanted to watch netflix.

This was my problem all along:

scorpion saver adware by adpeak

I soon as I uninstalled this malware, netflix was open, no more black screen :)

Should I remove it program helped me to uninstall it

http://www.shouldiremoveit.com/Netflix-Movie-Viewer-13003-program.aspx