file not found/address not found and some general questions about hacking

Everyday I come in to use my comp, I find one of those 2 messages when I try to browse. I found through messing around, that if I restart my computer I can browse. Once or twice a day I restart my comp.

Today I happen to notice that the address bar on the "file not found/address not found" page, that should have been mozilla firefox with google as my search engine, had the words google chrome within the cryptic (it's all cryptic to me--I'm using the term literally) address. I don't have google chrome, and I don't want it. So I got to hit the little icon on my lrft side of the bar. There's a pop up, and within it contains a place where all my stored passwords are revealed. Imagine that. So I restart, and get to my proper page. I hit the same icon and it states that it doesn't reveal private information, or something to that effect.

Why would google chrome store my saved passwords?

Why would I get a failed chrome page when I use the same browser everyday?

Is somebody after my passwords?

Is this unrelated to hacking?

Is there any way a person can ascertain who has been snooping? Are the addresses that touch my computer stored within my comp? If so, can I see them?

Is there a site that explains what hobby hackers and corporate info spies are able to do? How to identify them etc.

I've always thought that it is more important to flush hackers out than prevent them.