> Now if they could just fix Firefox Mobile's abysmal tab management. Chrome Mobile's tab screen is a stack of pages in the Z-axis with the one closest to the user being the most recent tab and so on. Firefox Mobile's is a grid with the number of rows and columns being variable depending on screen dimensions.

You can change it to a linear list easily. Settings -> General -> Compact Tabs.

Personally I strongly prefer the way Firefox does it. The order is actually pretty simple. Left to right, top to bottom is oldest to newest.