Heaven knows why they decided to drop Firefox and make Grob from scratch for the Harmattan UI. Tabs, settings etc. too complicated? Side-slide UI contrasted too much with systemwide Swipe UI? Eat-your-own-dogfoot Qt mentality? Feels like a good way to waste time if Firefox customisation was nearly done? Anyway, those plugins might be quite good if they can be installed on a current (15+) Fennec. Also I'm glad they commissioned Nokia Pure. Nokia Sans feels like an (unwelcome) blast from the past!