Firebug not showing ::before and ::after pseudo-elements -

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after searching extensively on why these pseudo-elements not shown firebug in html inspector way in firefox , chrome built-in debugger, came across number of results indicating indeed possible. testing on 4 different computers including windows , mac os still not find these in html inspector. there setting missing?

right using firefox 38.0.5 , firebug 2.0.11 on mac yosemite.

update:

actually looks feature still in development: https://code.google.com/p/fbug/issues/detail?id=5785. screenshots saw must have been related effort.

firebug displays pseudo-elements within style side panel selected element, not within main html panel.

<code>::before</code> pseudo-element shown in *style* side panel


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