Firefox v.5 and up - focus text cursor on anything

I have noticed that from version 5 Firefox and up you can focus typing cursor on anything that is text based ( a, p , h1, h2 etc.. ).

Screen shot 1 Screen shot 2

Any one know how to stop this is CSS? It has no value to the user, and it is ruining my jQuer开发者_如何学JAVAy animations ( e.g. when function is assign to paragraph onclick event).

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This is not a default option. Turn off "Always use the cursor keys to navigate with pages"