From this link on the Register.

An insecure web browser will show apple.com when you hover the mouse over this link.

To fix this in Firefox, go to about:config and set the following two values to true

• network.IDN_show_punycode
• network.standard-url.punycode-host

• English aceijopxyABCHIMOPTX
• Cyrillic асеіјорхуАВСНІМОРТХ

Example for www.іnfоblоx.соm

U+2044 ⁄

U+2215 ∕