Unfortunately, reading standard A4 or 8.5x11 pdfs on the Clara is a pretty painful experience (KOReader is a little better but not enough better). Zooming and panning is just too slow and the screen is small enough that you'd need to do a lot of it. The browser is also not something you'd want to use regularly, since scrolling is similarly bad. A lot of what you're asking about is technically possible, but I really do not recommend it.
