So I got my Firefox 3.x alert claiming that newer and better version 3.5 is available and it's a recommended upgrade. Just now before couple of hours I have updated to Firefox 3.5 using it's auto-updater feature and when it restored previously open tabs and I noticed first change in this blogs title fonts.
Here, in below image you can see blog post title which has taken "Lucida Grande" as Font to render and it was same for rest of the browsers as well. Because Internet Explorer, Safari and Chrome all display it in the same manner.
If you had any recent experience after upgrading to Firefox 3.5 please share on this post by replying as comments.