My only complaint (and really this is my biggest gripe with Firefox in general) is that there is no support for syncing containers using your Firefox account. This means every time I set up a new computer I have to reconfigure my containers and for each computer I have to re-associate all the sites I have sandbox with their own containers. This is such a huge pain.
It's also a great issue for me since I have to reconfigure everything.
I don't know how the Firefox account works but the fact that FMAC is an extension and not natively included in Firefox may be explaining why it's not synced ?
My only complaint (and really this is my biggest gripe with Firefox in general) is that there is no support for syncing containers using your Firefox account. This means every time I set up a new computer I have to reconfigure my containers and for each computer I have to re-associate all the sites I have sandbox with their own containers. This is such a huge pain.
Other than that, I love it.