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 1,345,904 websites that are Facebook Pixel for Shopify Customers. We know of 52,838 live websites using Facebook Pixel for Shopify and an additional 1,293,066 sites that used Facebook Pixel for Shopify historically and 30,960 websites in the United States.
Facebook Pixel for Shopify websites that are also using other technologies.
Get a list of 1,345,904 websites using Facebook Pixel for Shopify which includes location information, hosting data, contact details, 52,838 currently live websites and an additional 78,622 domains that redirect to sites in this list. 1,293,066 sites that used this technology previouslyand 30,960 websites in the United States currently using Facebook Pixel for Shopify.
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