特定のリンクにアイコンをつけるUserCSS
code:style.css
.line span:not(.modal-image):not(.pointing-device-map) > a.link:not(.icon):not(:is(href$=".pdf",[href^="https://github.com"],[href^="https://raw.githubusercontent.com"],[href^="https://gist.github.com"],[href^="https://ja.wikipedia.org"],[href^="https://en.wikipedia.org"],[href^="https://www.amazon.co.jp"],[href^="https://amazon.co.jp"],[href^="https://twitter.com"],))::after{font-family:'Font Awesome 5 Free', 'Font Awesome 5 Brands';font-weight:900;font-size:0.8rem;content:'\f35d';display:inline-block;cursor:text;}.line span:not(.deco-\.) > span > a.link:is(href$=".pdf",[href^="https://github.com"],[href^="https://raw.githubusercontent.com"],[href^="https://gist.github.com"],[href^="https://ja.wikipedia.org"],[href^="https://en.wikipedia.org"],[href^="https://www.amazon.co.jp"],[href^="https://amazon.co.jp"],[href^="https://twitter.com"],)::before{display:inline-block;width:1em;height:1em;vertical-align:-1px;text-align:center;background-size:contain;background-repeat:no-repeat;cursor:text;}:is(.line, .line .deco) a.link:is(href$=".pdf",)::before{content:'\f1c1';font-weight:400;margin-right:1px;}:is(.line, .line .deco) a.link:is([href^="https://github.com"],[href^="https://raw.githubusercontent.com"],[href^="https://gist.github.com"],)::before{content:'\f09b';font-weight:400;margin-right:1px;}:is(.line, .line .deco) a.link:is([href^="https://ja.wikipedia.org"],[href^="https://en.wikipedia.org"],)::before{content:'\f266';font-weight:400;margin-right:3px;}:is(.line, .line .deco) a.link:is([href^="https://www.amazon.co.jp"],[href^="https://amazon.co.jp"],)::before{content:'\f270';font-weight:400;margin-right:1px;}.line .deco-\. a.link:is([href^="https://ja.wikipedia.org"],[href^="https://en.wikipedia.org"],) span.char-index{display:inline-block;width:0;text-indent:-9999px;}.line .deco-\. a.link:is([href^="https://ja.wikipedia.org"],[href^="https://en.wikipedia.org"],) span.char-index:nth-of-type(30) ~ span.char-index{display:inherit;width:inherit;text-indent:inherit;}