I use profiles. For me it‘s useful for switching between personal, work and presentation „mode“, because I use a different set of bookmarks and extensions for each one.
I hate how cease and desist are essentially blackmail. Even if you did nothing wrong, you can still get fucked over by costs of a potential legal battle.
Well you can‘t say that you didn‘t write „documentation“.
You can see an approximate playtime in your profile. (Icon in the upper left corner on the home-screen)
Cold fusion has a very interesting video about this topic and how AI fits into all of this.
AI is honestly just A most of the time.
Sometimes they make sense for managing mod-sets/different instances (i.e. Stellaris or most famously Minecraft.