The latest Mac-only update to Mozilla’s open-source Web browser, Firefox 5.0.1, brings only two changes, but they’re important. First is a workaround for a crash that could occur in the forthcoming Mac OS X Lion when using downloadable fonts. Since downloadable fonts are quite common on the Web, Firefox 5.0 users would have seen significant numbers of crashes after upgrading to Lion. Second, Apple’s update to Java in Mac OS X 10.5 Leopard broke the Java plug-in in Firefox (see “Java for Mac OS X 10.6 Update 5 / Java for Mac OS X 10.5 Update 10,” 29 June 2011); version 5.0.1 enables Firefox to load the Java plug-in in Leopard once again. (Free, 27.8 MB, release notes)
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Multi-Monitor iChat in Snow Leopard
In Snow Leopard, on a multiple-monitor system where you're using screen sharing over iChat, dragging the tiny inset preview of your own screen to another monitor shifts the remote screen to that monitor.