All these 'improvements' were done (and done better) via "Self-Destructing Cookies' addon, and 'Flush Flash' app. I don't know if Firefox/Mozilla is any better than Chrome/Google, but if there is a difference, it ain't much of one. Rather like trying to decide which TLA is the least obnoxious. Mozilla has a long and nasty history:

https://digdeeper.neocities.org/ghost/mozilla.html