somewhat better

public/favicon/browserconfig.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/mstile-150x150.png"/>
+            <TileColor>#ffc40d</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

public/favicon/safari-pinned-tab.svg

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+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
+ "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
+ width="1350.000000pt" height="1350.000000pt" viewBox="0 0 1350.000000 1350.000000"
+ preserveAspectRatio="xMidYMid meet">
+<metadata>
+Created by potrace 1.14, written by Peter Selinger 2001-2017
+</metadata>
+<g transform="translate(0.000000,1350.000000) scale(0.100000,-0.100000)"
+fill="#000000" stroke="none">
+<path d="M13310 8119 c-1618 -85 -3061 -244 -4722 -519 -1678 -279 -3360 -641
+-5698 -1226 -623 -156 -995 -251 -2467 -630 l-423 -109 0 -2117 0 -2118 6750
+0 6750 0 0 3365 c0 3199 -1 3365 -17 3364 -10 -1 -88 -6 -173 -10z"/>
+</g>
+</svg>

public/site.webmanifest

@@ -0,0 +1,19 @@
+{
+    "name": "Livecoding.fr",
+    "short_name": "Livecoding.fr",
+    "icons": [
+        {
+            "src": "favicon/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "favicon/android-chrome-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff",
+    "display": "standalone"
+}