Tried turning off hardware acceleration and disabled NPWLPG plug in, but still crashing.

There is a problem on Windows 8 with Firefox 19 and AMD Radeon HD 6XXX/7XXX graphic display cards.

This issue is currently being investigated in bug 830531.

• Bug 830531 - [Win8] crash in XPC_WN_Helper_NewResolve mainly with AMD Radeon HD 6290/6310/6320/7290/7310/7340

If you have one of those display cards then best is to stay with or downgrade to Firefox 18.0.2 for now.

• https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/18.0.2/win32/en-US/