We should think a bit about how we want to display the activity stream panel on tablets (and maybe phones in landscape). We could start by defining a maximum size and adding whitespace to the left and right how we do it with our current top sites panel.
We now add dynamic padding to the left and right to the panel like we did with the old top sites panel. With that we might not need to do any additional work for the MVP to support tablets.
Tablet behaviour seems reasonable right now (we've also added dropdown menus for tablets in Bug 1312477, instead of the bottomsheet menu). Would you be OK with either closing this, or moving it to P3 (i.e. taking it out of the MVP)?
I agree - with the added padding, the dropdown menus and dynamic number of top sites this is looking pretty good on tablets. Let's close this one (there's no specific action in here anyways). And as soon as we have closed the last UI bugs let's have a UI review session with Bryan and then open bugs for things that need polish.