Firefox freezes when using Audiogon

Like Al, I'm using Firefox 44.0.2 with no problems.  Also using uBlock Origin like @tls49.  You can try starting Firefox in "safe" mode.  This will temporarily turn off all extensions and plug-ins.  You can get more information here.  Dick

@bombaywalla - Like Al, I've never had Firefox pop up and ask/warn me to install a security patch.  Quite a while back they switched to "silent" updates that only manifest themselves as a slower load time while the update is installing.  Also like Al, at this point I'd be worried that something else is really the cause of your problems.  I would scan my system pronto.  I've had the most luck with a product called Malwarebytes.  Like most software of this type, they hawk the premium version which you don't need so watch for offers to activate the premium version during install.  It's very important to run this type of software in Windows' safe mode (hold down the F8 key during bootup).  This gives the software the best chance to find and eliminate any threats.  If it finds anything, go ahead and remove it.  Then run it again and again until it doesn't find anything else.  Boot you machine back to normal mode, use it for a day or so and then repeat the process in safe mode to make sure something didn't sneakily reinstall itself.  There is malware that can even hide itself in old Windows restore points.

Dick

@bombaywalla you're not alone.  I've cleaned up lots of machine for friends and colleagues.  The worst one I've seen to date had over 9,400 suspicious items according to Malwarebytes.  This was also a situation where a grandchild was playing numerous "free" games.  That one took a while to clean up!  Dick

@bombaywalla Good news indeed but I assume that it doesn't solve your initial problem with Firefox.  If anything else occurs to me, I'll let you know.