Replace nautilus_blue.svg with simpler svg that does not hurt Firefox feelings

portal/static/lib/nautilus/nautilus_blue.svg

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stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-3" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-4" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-5" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient 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stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-10" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-11" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-12" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient><linearGradient id="vortex-0-13" color-interpolation="linearRGB" x1="0" y1="1" x2="0" y2="0"><stop offset="0.13" stop-color="#99c1f1" stop-opacity="0.17"/><stop offset="0.71" stop-color="#3584e4" stop-opacity="0.5"/><stop offset="1" stop-color="#1a5fb4" stop-opacity="1"/></linearGradient></defs><g transform="translate(70 16) rotate(0 960 460.5)" class="group"><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-13)" fill-opacity="1.0714285714285714" stroke="rgba(34, 106, 194, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-195) scale(10.699320537907195)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-12)" fill-opacity="1.1428571428571428" stroke="rgba(40, 115, 205, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-180) scale(8.916100448255996)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-11)" fill-opacity="1.2142857142857144" stroke="rgba(47, 123, 217, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-165) scale(7.430083706879997)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-10)" fill-opacity="1.2857142857142856" stroke="rgba(53, 132, 228, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-150) scale(6.191736422399997)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-9)" fill-opacity="1.3571428571428572" stroke="rgba(65, 140, 230, 255)" 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stroke="rgba(103, 162, 234, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-90) scale(2.9859839999999993)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-5)" fill-opacity="1.6428571428571428" stroke="rgba(115, 170, 236, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-75) scale(2.4883199999999994)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-4)" fill-opacity="1.7142857142857144" stroke="rgba(127, 177, 238, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-60) scale(2.0736)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-3)" fill-opacity="1.7857142857142856" stroke="rgba(139, 184, 239, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-45) scale(1.728)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-2)" fill-opacity="1.8571428571428572" stroke="rgba(151, 192, 241, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-30) scale(1.44)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-1)" fill-opacity="1.9285714285714286" stroke="rgba(153, 193, 241, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(-15) scale(1.2)" transform-origin="1010 510.5"/><rect x="960" y="460.5" width="100" height="100" rx="20" ry="20" class="rect" style="mix-blend-mode: normal;" fill="url(#vortex-0-0)" fill-opacity="2" stroke="rgba(153, 193, 241, 255)" stroke-opacity="0" stroke-width="1" opacity="1" transform="translate(0 0) rotate(0) scale(1)" transform-origin="1010 510.5"/></g></g></svg>
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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 600">
+  <defs>
+    <linearGradient id="bg-gradient" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#3a7bd5;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#65b0e1;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+
+  <rect width="100%" height="100%" fill="url(#bg-gradient)"/>
+
+  <path d="M0,150 Q250,50 500,150 T1000,150 V600 H0 Z" fill="#5094d4" opacity="0.5"/>
+  <path d="M0,250 Q250,150 500,250 T1000,250 V600 H0 Z" fill="#65a4de" opacity="0.4"/>
+  <path d="M0,350 Q250,250 500,350 T1000,350 V600 H0 Z" fill="#7ab4e8" opacity="0.3"/>
+  <path d="M0,450 Q250,350 500,450 T1000,450 V600 H0 Z" fill="#8fc4f2" opacity="0.2"/>
+  <path d="M0,550 Q250,450 500,550 T1000,550 V600 H0 Z" fill="#a5d4fc" opacity="0.1"/>
+</svg>
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