On our near future roadmap is to start unloading stuff way as you load up tons of topics. At the moment we are keeping every post you have loaded into a topic you are browsing, in memory. We are going to start unloading posts as you scroll through large topics which will lead to a very big perf improvement for Firefox.
Can you explain what POLA is? Keep in mind, the styling is totally controlled by @beschizza and team, if they wish to tighten up whitespace, remove controls, disable animations and transparency effects and so on, it is totally up to them.
