I ran across a web site that was part of a scam. It pretended to be one of the security programs on my computer and reported that my Computer had malware (it was the malware). The only way out and not activate the scam program was to use the Windows Task Manager to kill Firefox. When you do this the next time Firefox is started it tries to reload the last pages visited including the bad web site. How do I disable this feature? Or force Firefox to ask me which pages to load every time. Automatic should not be allowed because of these scams. Fortunately I had a work around, I pulled the network cable when I restarted Firefox causing a different failure that could be cleared.