WEll, I have no great answer but I do find that my browser takes forever to get opened and bring up that first page or bookmark. I just re-installed everything and dumped that 'ad blocker plug-in' and the browser boot up is still over 10-15 seconds.

If your getting a 'no start' at all, you may have to start fresh with a new install of the OS.

I have found no good answer to some of those anomalous bugs and that seems to be my only choice when it fails like that. It happened to me once with a new install of Skype.