Mozilla to fix 9-month-old Firefox bug

Mozilla will patch Firefox against a nine-month-old protocol handler bug, its chief security executive announced Friday, after researchers demonstrated that the vulnerability was more serious than first thought. The bug is another uniform resource identifier (URI) protocol handler flaw, and the news of an impending fix comes on the heels of Microsoft patching Windows to repair problems in the handlers it registers. Protocol handlers -- "mailto:" is among the most familiar -- let browsers launch other programs such as an e-mail client through commands embedded in a URL.

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