The past 24 hours have seen Mozilla Firefox (download from CNET for Windows and Mac) getting another security hole plugged, while its social-networking derivative Flock (also at CNET for Windows and Mac) earns a minor behavioral bug fix.

Firefox's most recent safety snafu is another JavaScript engine security problem that was causing the browser to crash during JavaScript garbage collection. Although there was no indication that this error was exploitable, says Mozilla, other similar errors in the past were. Not to mention the benefit of not having your browser randomly going kablooey.

Flock's fix involves repairing the People sidebar. For many users, Facebook friends weren't populating in the sidebar and now they should be. Of course, if you're like me and you lack not only Facebook friends but a Facebook account, too, then this was never an issue.