how do i retrieve the webpages in power failure or restart
Suddenly there was a power failure or firefox crash while i was browsing and i am unable to retrieve the pages. What is the procedure to retrieve pages?
Hopefully this support article is what you need:
If that doesn't help, try accessing about:sessionrestore in your location bar. It will let you restore your last session (which means you shouldn't close Firefox a second time after the lost session was closed).