Yeah, that is the trouble with it, isn't it. The whoel alternative browser scene is basically either Chromium or Firefox knockoff.

Hence, if you know what you are doing, about:config is a nice playground. Most people will not have the time and willpower to go through a steep learning curve. So, pre-made systems are the to goto solutions.

In essence, if one were to look for solutions, Iceweasel still is capable of everything.