did there is option to add features of css3 to old browser which not supported?
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1 - Did Modernizr only detects what features are supported by the browser ? 

2 - Did Modernizr it able to add features to browser which not exist in old browser ?

3 - did there is option/solution to add features of css3 to old browser which not supported not related to Modernizr  ?

Many Thx.