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 1,422,088 websites that are Facebook Pixel for Shopify Customers. We know of 79,902 live websites using Facebook Pixel for Shopify and an additional 1,342,186 sites that used Facebook Pixel for Shopify historically and 47,571 websites in the United States.
Facebook Pixel for Shopify websites that are also using other technologies.
Get a list of 1,422,088 websites using Facebook Pixel for Shopify which includes location information, hosting data, contact details, 79,902 currently live websites and an additional 112,981 domains that redirect to sites in this list. 1,342,186 sites that used this technology previouslyand 47,571 websites in the United States currently using Facebook Pixel for Shopify.
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