I discovered this - totally by accident.
In Firefox, you can use / (forward slash) to search for text OR links - and if its a link, then you can follow the link just by clicking Enter! That is way cool - especially when you’re on a laptop and cant/dont have your mouse around. I’ve always find it a pain to do a "link find" - ' (single quote) and a text find - ctrl-f separately…Never knew that there was a shortcut that did both and what more - its way natural if you’re used to 'less'!!
To complete the keys for Firefox mouseless browsing,
space - page down
shift - space - page up