Normally, fine. Recently, mischief is occurring on Facebook where nothing (or nothing within 1 minute) will load. As of today (after the NoScript extension update), Firefox's yellow warning bar appears at the top of the page and says, "A script in the extension "AdBlocker Ultimate" is causing Firefox to slow down." Options offered are to "Temporarily Disable Extension on Page," "Stop It," or "Wait." Where the fault lies, who &*%$ing knows. ;)