My issue with the Pocket integration is that it's non-removeable - you get it whether you want it or not, and even if you remove the button from the toolbar, the code is still there within Firefox. You can't remove it like a plugin. To me, it adds another security problem that can only be fixed with an update of the whole browser, and you don't have the option not to have it.

But as I said, Mozilla were very up-front with the plans. They weren't with Looking Glass.