There is no mathematical definition of copyright, because it’s just based on feelings. That’s why every small problem has to be arbitrarily decided by a court.
Chrome’s developer tools are better, and having two browsers open at the same time while programming is a strain on RAM resources, especially since Visual Studio Code needs to run in its own Chromium.
At least in Cities Skylines 1&2, where the player has a good overview of the behavior, they only work for low to medium amount of traffic. If you have one side sending in cars constantly, the others never get an opportunity to enter the roundabout, so there’s a traffic jam spanning through the whole city behind it.
Works fine for me with Ublock Origin.