Mozilla's latest version of Firefox addresses a critical security flaw that was recently discovered at the 2010 Pwn2Own contest by security researcher Nils of MWR InfoSecurity. The flaw, which existed only in version 3.6 and later, was related to memory corruption via "re-use of a freed object due to scope confusion," and could have led to an attacker running arbitrary code on a victim's computer. (Free, 19 MB)
Option-Click in Scroll Bars for Jump Scrolling
In Mac OS X in general, and thus in most native Mac OS X applications, hold down the Option key and click anywhere in a window's scroll bar to jump to that spot (rather than scrolling one screen). If you like this behavior, you can make it the default in the Appearance preference pane. For "Click in the scroll bar to:" select "Jump to here."
Set up short abbreviations which expand to larger bits of text,
such as “Tx” for “TextExpander”. With the new custom keyboard,
you can expand abbreviations in any app, including Safari and