Fash is supported in fennec, but not in the default browser. We wanted to keep a clear differentiation between "desktop" -alike browsing and mobile browsing. Default browser focuses entirely in one handed use and relaxed browsing, where as fennec just does it all and acts like a desktop browser (tabs and all)
Landscape home is not available as default. You will need to install a theme that pretty much just inherits the default theme and overrides one property. I'm sure that will be available on sales start."