Yes radon and oganesson are radioactive. Generally everything heavier than lead is radioactive. The rest in this column isn‘t dangerous, because these are noble gasses and don‘t (typically) react in any way.
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.
So true