Thanks for your feedback! The content of the ePub-file is just shown in an iframe. So if there is a problem with scrolling, it's a problem of Firefox itself. I had a look at the Firefox Mobile bugs and have seen that there seem to be still problems with scrolling. If you don't drag the page, but use tapping left/right top/bottom for scrolling/paging it's hopefully not a problem. Concerning the indicators I'll contact you via email. I think it's easier to discuss it that way. Best, Michael