Why does Firefox crash so often in Vista?

Instead of asking why it crashes, maybe try what makes it crash...I have vista with no problems. I know this isn't an answer to your question, but I agree check the sites.....Also programs running

I have Vista and I always use FireFox. It works perfectly fine, maybe it's certain websites that cause problems Conflicting (and poorly written) browser add-ons can also cause stability issues. You might try removing any add-ons you've installed (especially those form 3rd party sites) and updating to the latest version if Firefox.