I like tiny communities as much as anyone but I personally see no need for this to exist. Firefox might consume 2GB but it is also running hundreds of tabs. 8GB of RAM was more than enough. On Linux I rarely went over 4.5GB. Worst offenders are JVM based applications. Notably modded Minecraft can consume absurd amounts of RAM.

I'm more terrified of the average electron app or java app than I am scared of a single browser tab.