Sometimes it's easier to avoid problems rather than try and elegantly solve them. Linux offers a lot of flexibility; for example, multiple users can use the same system – indeed, even the same screen, keyboard, and mouse. For the long term, placing individual applications within containers that can be restored easily is the way to go. Certainly you can't rely on your software to be free of bugs.
- Firefox 3.0.5 Status Bar Obfuscation/Clickjacking: http://www.milw0rm.com/exploits/7842
- NoScript add-on for Firefox: https://addons.mozilla.org/en-US/firefox/addon/722
- Content Security Policy: http://people.mozilla.org/~bsterne/content-security-policy/
- Xhost manual page: http://www.x.org/archive/X11R6.9.0/doc/html/xhost.1.html
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