Internet keep showing error when browsing

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I uses IE at work and Firefox at home. Both seems to be giving me problem which I was so frustrated where I used back my chrome. I use multiple tab at IE and this causes some of the tab 'crash'. Then it says, tab been restored etc which leaving all my work on that tab if unsaved to be vanished. Anyway to solve this? As for firefox, I noticed this few days where I was browsing the bet and even checking my mail. It then hang and nothing pops up. Example using yahoo mail, clicking on the mail and no mail will be shown at the bottom screen. Double clicking and the mail cant be open too! It just stucked at Loading screen. Any solution to this? I have tried reinstalling and even downloading the new installer but it still happens!