Rated 4 out of 5 stars

Try Containers, native item. This may be an acceptable alternative to Sessions and it's native.

https://medium.com/firefox-test-pilot/firefox-containers-are-go-ed2e3533b6e3


Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!! Please!!

Update for FF57.

This review is for a previous version of the add-on (0.8.1.13).