Dunaz, I agree completely on this! There are no navigation controls in the help system at all, and even standard gestures, like swiping, don't work.
I think the best thing that could easily be done, is to add a bottom to "open in browser."
This frustrates me in the "suggest a feature" choice from the help screen also. I don't know why there's an effort to encapsulate all this within the Fresco app when it could just launch the browser.
I've created a feature request here, please go and add your vote:
https://adobefresco.uservoice.com/forums/919786-adobe-fresco/suggestions/38901886-the-online-help-should-allow-open-in-browser