No, there is no such a thing in Mozilla Firefox, and no other Web Browser.

Firewall is a needed program, specially in Windows. But there is no need to install one when using Mozilla Firefox. Firewall is a program to protect your system from unwanted data connections. If you have one your security will be increased.

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first you say I need a firewal especially when using windows . then you say there is no need when usong mozila firefox . so what is the answer I understand that there is no fire wall with the prog and as you stated and no other web browser . so how come I don´t need on ewhen using mozila fire fox . eeehh by the way is panda anti virus good - to you´re knowledge

happyfunny

I meant that having firewall is not a must to use Firefox. But I recommend you to use one. It is really a necessary program.

Don't worry about me, I'm using a reliable Firewall that I trust completely!

In fact, having a firewall or not is not related to Firefox. Completely different topics!