Use chrome and create multiple users 

In settings

[![enter image description here][1]][1]


you can shift to a different user using top right menu

[![enter image description here][2]][2]

every user  opens in a seperate window. Each window uses its own cache, saved passwords, bookmarks etc.


  [1]: https://i.sstatic.net/w4Wvn.png
  [2]: https://i.sstatic.net/sUBTq.png