header and layout tweaks (bug 899752)

https://bugzilla.mozilla.org/show_bug.cgi?id=899752

# Desktop
![](http://cl.ly/image/2k3u0g0X1s0W/Screen%20Shot%202013-08-28%20at%205.57.05%20PM.png)
![](http://cl.ly/image/2G1b1d160S26/Screen%20Shot%202013-08-28%20at%205.59.43%20PM.png)
![](http://cl.ly/image/1z2840131R0F/Screen%20Shot%202013-08-28%20at%206.00.30%20PM.png)
![](http://f.cl.ly/items/092U40220f1D0m3t0Z3T/Screen%20Shot%202013-08-28%20at%205.58.18%20PM.png)
![](http://cl.ly/image/222v0O2B0k2k/Screen%20Shot%202013-08-28%20at%205.58.37%20PM.png)

# Mobile
![](http://f.cl.ly/items/0x3z2Z3D2K403e2U1G44/Screen%20Shot%202013-08-28%20at%206.14.07%20PM.png)
![](http://f.cl.ly/items/3L1v3J1q2m1M101P3n2R/Screen%20Shot%202013-08-28%20at%206.14.29%20PM.png)
![](http://f.cl.ly/items/462Q2A031c0e0c0D1h0K/Screen%20Shot%202013-08-28%20at%206.14.49%20PM.png)
![](http://f.cl.ly/items/462Q2A031c0e0c0D1h0K/Screen%20Shot%202013-08-28%20at%206.14.49%20PM.png)