Is this tire feathering?

Tractionless

Says inner on the fronts.

OP,

Suspension setup is not mentioned, incorrect/insufficient rebound can also cause such issues. Wear to and/or type of dampers is important.

If tracking you're car I'd also stay away from Firestone and find a road race shop who will take more time and has the knowledge/patience to do it properly. There has to be plenty near COTY to chose from.

I have mine done by such a shop for my spirited street car. It takes an hour and a half for the entire procedure with complete OE front and rear suspension with aftermarket rear camber and toe adjusters in the rear only. Even longer if I had A-arms, coil-overs and the rest of the goodies of many members here. Expect multiple hours if/when you jump into corner weighting.

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Toys Not Tots