I'll copy-pasta myself from a different thread, mainly due to relevance on this thread...
Currently, the Firebug class thrives on Area-of-Effect combat. Basically, spray a huge mess of flames at the specimen and scorch everything to the ground. The more fire, the better.
Consequently, I would like to see something more specialized added as a secondary option to the standard Firebug gameplay. All the other classes are given this option except for the Firebug.
For example, if you're Commando, you can choose to carry either the Bullpup (high ROF), versus the AK (high DPS). If you're Sharpshooter, you can choose between the XBow (high-damage, single shot) or Lever Action (medium-damage, multi shot) or Handcannons/9mm's (high ROF). There's multiple ways to play all the classes, except for the Firebug.
Perhaps to contrast the typical AOE combat of the Firebug, devs should implement some type of accurate, direct combat weapon that ignites specimen. In the same vein of a "laser weapon", you could have it so on contact, the specimen are ignited (kind of like an accuracy-intensive Firebug weapon).
This would give the Firebug the option to choose between AOE and direct damage styles of gameplay.
That's exactly my reason for starting the topic. The Firebug is cripplingly limited to the 'Area Effect' stuff right now. Against beefy enemies (On Hard, even Gorefasts qualify under this!), the 'Area Effect' stuff doesn't cut it. They close in on you, right through the area-damage and beat the tar out of you. The Firebug needs options to resort to in these situations!
A Flare Gun/Laser/Whatever that hits single or closely-grouped targets for big damage would be ideal. Even if it's not instant kill, the damage needs to be high. I'd like to see something that, if it hits and ignites an enemy even as big as a Skrake, you can think "Yeah, he's still coming, but he'll be dead in 5 seconds!" Big damage.
Or something that turns them into a close range (But not point blank!) powerhouse, like, as someone said, a Flamethrower with tiny range (And ineffective within 5 feet...gotta get distance!), but great damage to enemies in it's "Sweet spot".
We've just gotta have options. Yeah, we have the Fire Nades, but for the most part, they're just an extension of what the Flamethrower already has: Area-Effect damage...
Also, FOR THE LOVE OF GOD, TRIPWIRE, FIX THAT NASTY FLAMETHROWER RECOIL! It's really excessive. On Hard/Suicidal, where you can't kill enemies without constant spraying for a few seconds, those few seconds of spraying can and will cause the Flamethrower to practically leap from your hands. That may have been intended, I realize, but it makes it incredibly frustrating to play at above Normal. This needs fixing! If nothing else, do like most other classes and reduce the recoil based on Firebug levels! Even a 50% recoil reduction at Level 5 would be amazing (75% would be ideal!)