Currently, having any add-on installed will block it. In the future, they want to work with a whitelist, but for now, they are being extremely cautious with the

Currently, having any add-on installed will block it. In the future, they want to work with a whitelist, but for now, they are being extremely cautious with the rollout, since e10s is considered the biggest architectural change that Firefox has ever gone through. Here's their (very preliminary and not terribly official) schedule: https://wiki.mozilla.org/E10s#Schedule https://wiki.mozilla.org/E10s#Schedule