I don't know ... Article here you might read... might be part of it.

Make sure you get the most current silverlite from the Microsoft site.
http://www.microsoft.com/silverlight/

Here is a link that might be useful: http://thenextweb.com/insider/2012/10/12/mozilla-details-how-old-adobe-reader-flash-and-silverlight-plugins-will-be-blocked-in-firefox-17/

Cannot find any more recent version of Silverlite.

I did find a Mozella users forum where there were complaints back on Nov 24-26 of some Silverlite applications not working with 17. The subject line there was 'can I go back to 16'. They offered changes to About which were workarounds, not fixes. They lost me there. But that was 17-19 days ago. I would have expected a real fix. Perhaps it's the season.

I just remembered that this problem appeared after Windows urged me into accepting a bundle of those more or less regualr updates upon me.

There was a time that Firefox (and its Netscape predecessor) offered a better experience than Internet Explorer. I think that time has passed.

I've had too many quirky incidents and problems with Firefox lately, so I've stopped using it. My experience is that IE has improved a bunch while FF has sunk, and Chrome is also solid (though it seems to be not as compatible with some web features as IE is).

Life is too short to drink bad wine. It's also too short to struggle with one free browser, when there are a half dozen also free alternatives that are perfectly satisfactory.

Have to agree with you, snidely. By all means be willing to try different browsers. When I find one I like, I stick with it until I decide I like a different one better. Been with Chrome for several years now, but still have both IE and FF on my machines.

I know every one raves about fire fox but on both my compurters it freezes a lot when browsing and always has and just does not work right. I know it's not my computers because I don't have one single issue of IE freezig or acting up so I don't get it.

I keep firefox installed just in case IE would go out. I just updated to the latest version and netflix plays on it and I get no error but I have no clue about what silverlite is or what I have but if someone tells me I could check and see. Mary

Hey Snidely 10-4 on FF vs IE. I guv up on FF then tried SeaMonkey then Maxthon3 both had problems (for me) all Mozilla products. Back to Chrome and thence IE again sometime soon.

Oddly the Seamonkey pointer had the hourglass blinking rapidly most of the time - drove me nuts. Googling showed that problem unsolved for at least 10 years. Or guessed at complex solutions surpassing all comprehension.

Just FWIW, I am certainly no authority. The little annoyances in Chrome are not nearly as bad as the large annoyances FF kept blessing my computer with. Seems that every browser has its season.

The reduction FF in quality began when they established the six week release cycle.

Here is a link that might be useful: Firefox Rapid Release Calendar

You could be right, DA, but a 6 week release cycle should provide quicker attention to problems. Though I think any software developer works on and releases significant problem fixes asap, no matter what the schedule.

I saw the same freezes Crafty mentioned, and also erratic shutdowns and window shifts. On three different Win 7 machines, all with different versions of FF in case I found one better than another. I saw problems with all of them, which made me think it maybe was a FF/Win 7 problem, but no matter, I moved on.

I had the same trouble with vista and XP when I tried firefox. I would say it was my computers all those times but IE runs so smoothly and never gives me one bit of trouble on any of those operating systems but it had to be a conflict with something. Mary

I used FF back when it was a kit though admittedly as a backup. Through the years it has grown to my liking. Other than a bad download or losing an occasional add-on I have never had a negative occurrence. Everything is fallible so I can't sit here and say FF is perfect. I do however wonder how many concerns are user generated, particularly those who for whatever reason are entrenched with XP.

DA

Over at support.mozilla.org it says that Quicktime, whatever that is, won't play on 17.0.1.