On many websites pressing the slash key ( / ) jumps to their own respective search boxes, which is a very useful feature. On Firefox, however, it opens the quick find and to my knowledge there is no way to change that.
Turning off accessibility.typeaheadfind.manual in about:config doesn't work, since this also disables the website shortcut's functionality for whatever reason.
Thus, I propose the quick find shortcut key to be moved to another key, freeing up slash ( / ) to be acessible by the website.