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=-webkit-mask-box-image:url(https://fuzz.shazzer.co.uk/dfi8g6acfjt?-webkit-mask-box-image)></div><div style=-webkit-mask-box-image-source:url(https://fuzz.shazzer.co.uk/16q0kce88fh?-webkit-mask-box-image-source)></div><div style=background:url(https://fuzz.shazzer.co.uk/yvvmw2tz9r?background)></div><div style=background-image:url(https://fuzz.shazzer.co.uk/kfo8mp5rqc9?background-image)></div><div style=border-image:url(https://fuzz.shazzer.co.uk/bk9fpie0jg?border-image)></div><div style=border-image-source:url(https://fuzz.shazzer.co.uk/6iv2ow178r?border-image-source)></div><div style=content:url(https://fuzz.shazzer.co.uk/s7hob9ys74e?content)></div><div style=list-style:url(https://fuzz.shazzer.co.uk/y27oengkksl?list-style)></div><div style=list-style-image:url(https://fuzz.shazzer.co.uk/ncm22ijmxgk?list-style-image)></div><div style=mask:url(https://fuzz.shazzer.co.uk/fql31h9ti?mask)></div><div style=mask-border:url(https://fuzz.shazzer.co.uk/5n0s50cfaap?mask-border)></div><div style=mask-border-source:url(https://fuzz.shazzer.co.uk/8k2ceja95yf?mask-border-source)></div><div style=mask-image:url(https://fuzz.shazzer.co.uk/si9h3b15aur?mask-image)></div><div style=shape-outside:url(https://fuzz.shazzer.co.uk/px53uzz7e8?shape-outside)></div><div style=-moz-border-image:url(https://fuzz.shazzer.co.uk/n0clziwkx5c?-moz-border-image)></div><div style=background:url(https://fuzz.shazzer.co.uk/3zumod5t71n?background)></div><div style=background-image:url(https://fuzz.shazzer.co.uk/sm3qf83vtvb?background-image)></div><div style=border-image:url(https://fuzz.shazzer.co.uk/4wd2sc7j6rw?border-image)></div><div style=border-image-source:url(https://fuzz.shazzer.co.uk/lp3vuw6olcl?border-image-source)></div><div style=content:url(https://fuzz.shazzer.co.uk/lbt8rpv6l6?content)></div>