How do you make it so firefox never reloads your tabs if your computer restarts?
May 19th, 2010 | 
Author: Whenever my computer restarts without me closing firefox first, firefox always asks me whether I want to load the previous tabs that were up before the restart. I don’t like that for privacy reasons – what if there’s a storm and the power doesn’t come back on until I’m gone? How do I turn it off.
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Type about:config in your address bar, and hit return.
If you’ve never manually altered your configuration, a warning box will pop up. Click through it.
There will be a bunch of preferences listed. Scroll down to browser.sessionstore.enabled
In the third column, the value should be "true" Double click it to change it to "false"
Restart Firefox.
Now Firefox will not periodically save your session, so that it will be unable to restore your tabs if it crashes, or if you close Firefox when you have multiple tabs open.
If you still want to be able to save your tabs, but don’t want your tabs restored if there is a crash, you could try changing the value of browser.sessionstore.resume_from_crash instead of browser.sessionstore.enabled. I have no personal experience with this, but it seems to be pretty straightforward.
Hope this helps!
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