February 28, 2005
On this day:

Firefox update

If you haven't done so already, you can now update to Firefox 1.0.1.
Mozilla released Firefox 1.0.1 to fix, among other bugs, a vulnerability in the Internationalized Domain Names (IDN), a standard for handling special character sets in domain names that lets companies register domain names that appear to be the same in different languages.

The IDN vulnerability allowed an attacker to create a fake Web site on a non-Microsoft browser in order to pull off a phishing scam. The updated browser will display the IDN Punycode in the address bar, preventing URL spoofing.
Firefox release notes and downloads

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