Facebook Pixel specifically for Shopify.
https://help.shopify.com/en/manual/promoting-marketing/analyze-marketing/facebook-pixel
Analytics and Tracking
Get access to data on 1,460,318 websites that are Facebook Pixel for Shopify Customers. We know of 83,268 live websites using Facebook Pixel for Shopify and an additional 1,377,050 sites that used Facebook Pixel for Shopify historically and 49,661 websites in the United States.
Facebook Pixel for Shopify websites that are also using other technologies.
Get a list of 1,460,318 websites using Facebook Pixel for Shopify which includes location information, hosting data, contact details, 83,268 currently live websites and an additional 118,236 domains that redirect to sites in this list. 1,377,050 sites that used this technology previouslyand 49,661 websites in the United States currently using Facebook Pixel for Shopify.
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