Is the HP Smart Web Printing extension installed in Firefox? <br /> orange Firefox button > Add-ons, then select Extensions <br /> If an extension by that name is there, disable it and see if that was causing Firefox to crash. Some users have reported a crashing problem related to that extension. If not that, see this: <br />https://support.mozilla.com/en-US/kb/Firefox%20crashes#w_getting-help-with-your-crash Type '''about:crashes''' in the URL bar and hit Enter. <br /> Click the hyperlinks to bring up the Crash Report pages and copy'n'paste the URL of each of those reports into the message box here. We'll see if we can help you figure out what is causing those crashes to happen.