Have you notice, that sometimes Flash-based videos stutter when you view them in Firefox, but work fine in other browsers like Internet Explorer, Chrome, and Safari? This turns out to be a problem of appears to be a problem of Firefox's session restore feature, that affects both Windows and Mac versions. So what's the solution? Well, you can either turn off the session restore feature altogether. Or simply lengthen the period of time between snapshots. To do this, type about:config into Firefox's address bar, then in filter box enter browser.sessionstore.interval. The default value’s 10000, which’s the number of milliseconds between snapshots. Setting the number to 120000 lengthens the period to two minutes, a more reasonable but still useful period. Of course, you can set it to whatever you want, as long as you keep in mind that you're dealing with milliseconds.