The Red Panda, also called the Firefox or Lesser Panda (Latin name: Ailurus fulgens, "shining cat"), is a mostly herbivorous mammal, specialized as a bamboo feeder. It is slightly larger than a domestic cat (40 - 60 cm long, 3 - 6 kg weight). The Red Panda is endemic to the Himalayas in Bhutan, southern China, Pakistan, India, Laos, Nepal, and Burma. There is an estimated population of fewer than 2,500 mature individuals. Their population continues to decline due to habitat fragmentation.
The above comes from the wikipedia and for as far i know no red panda lights his tail on fire ... they have a hard time using lighters and or matches and since no one can actually create fire with his or her mind i don't see why the firefox in the logo needs more fire.
Aside from that the new logo's look fine to me.