According to The Register, Germany’s cybersecurity team warned of a zero-day Firefox exploit:
“BürgerCERT, a division of the German federal government’s security in information technology (BSI) department, warned surfers to steer clear of the open source browser until Mozilla releases a fix, due on 30 March. The zero-day vulnerability in the latest full version 3.6 of Firefox was discovered by security researcher Evgeny Legerov last month and explained in much greater depth in our story at the time here. Legerov controversially offered to sell exploit code he developed.”
Firefox acknowledged the exploit and is releasing a new version of their browser by the end of the month. Read the full story at The Register.