So far, I can only tell if a property is inherited or not, but I need to know the source of inheritance, (for ex, which CSS file caused the final value ?) is this possible ?

Is there a handy tool for this ?

EDIT

Here is what I get in chrome Computed Style (show inheritance) See the direction property, there is no info about its inheritance source enter image description here

css google-chrome firebug google-chrome-devtools
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