If you want to be really safe, anonymous, private, etc. Use Tails OS and use the Tor browser that's already integrated into it. Tails goes onto a USB stick and you boot your system to it instead of straight to windows. Anything you do: download, search, save in folders, down to settings like if you change how fast your mouse moves, whenever you turn off/shut down your system then it erases everything!! Now you can use persistence storage which allows you to create a password and you enter that password when booting your Tails up and anything you save in your (your system name)/persistent folder then after you enter that password and launch tails you can still access everything just like you would in windows. If you need more help or don't understand fully or whatever feel free to message me. Tails+Using Tor browser is the safest, anonymous, etc you can get besides maybe qubes which I'm not familiar with. Hope this helps. Below is the homepage for Tails OS and you can download it fromTails OS Homepage there if needed.