e10s doesn't work for me

Hi,

when e10s is enabled (though forced `browser.tabs.remote.force-enable` hidden about:config option), sandboxes are not isolated anymore. (Login in one sandbox -> I'm automatically logged in in other sandboxes as well) I tried multiple restarts. Works if e10s disabled though.
However, changelog claims that e10s should be supported from v0.2.0? 

Priv8 0.2.0
Firefox 50.1.0