Uses a list of CSS properties and CSP violations to determine which properties cause external requests.
<div style=$[data1]:url(https://fuzz.shazzer.co.uk/$[rand]?$[data1])></div><div style=-moz-border-image:url(https://fuzz.shazzer.co.uk/5pxshcfi445?-moz-border-image)></div><div style=background:url(https://fuzz.shazzer.co.uk/uoux420ur8?background)></div><div style=background-image:url(https://fuzz.shazzer.co.uk/ylu3ksoi1fr?background-image)></div><div style=border-image:url(https://fuzz.shazzer.co.uk/jhtwqn7jib?border-image)></div><div style=border-image-source:url(https://fuzz.shazzer.co.uk/z96rpnx7jtj?border-image-source)></div><div style=content:url(https://fuzz.shazzer.co.uk/bh0tr4mi8oj?content)></div><div style=list-style:url(https://fuzz.shazzer.co.uk/h599tsll9e8?list-style)></div><div style=list-style-image:url(https://fuzz.shazzer.co.uk/omec6gfxmm9?list-style-image)></div><div style=mask:url(https://fuzz.shazzer.co.uk/m9bgd6rvni?mask)></div><div style=mask-image:url(https://fuzz.shazzer.co.uk/8uzwaqqb3as?mask-image)></div><div style=shape-outside:url(https://fuzz.shazzer.co.uk/84wroa199at?shape-outside)></div><div style=-webkit-mask-box-image:url(https://fuzz.shazzer.co.uk/fbiour0r9b6?-webkit-mask-box-image)></div><div style=-webkit-mask-box-image-source:url(https://fuzz.shazzer.co.uk/xn5gpxkjhi?-webkit-mask-box-image-source)></div><div style=background:url(https://fuzz.shazzer.co.uk/8siv7xagdv?background)></div><div style=background-image:url(https://fuzz.shazzer.co.uk/s7t7uyyywm9?background-image)></div><div style=border-image:url(https://fuzz.shazzer.co.uk/6653a7nbeq4?border-image)></div><div style=border-image-source:url(https://fuzz.shazzer.co.uk/zjf4znfcjh?border-image-source)></div><div style=clip-path:url(https://fuzz.shazzer.co.uk/4ceyleqnp4t?clip-path)></div><div style=content:url(https://fuzz.shazzer.co.uk/gfrq4hzs4sj?content)></div><div style=fill:url(https://fuzz.shazzer.co.uk/wzehyl4g9f?fill)></div>