Estoy construyendo un componente meteorológico usando los SVG de este enlace:http://codepen.io/TechnotronicOz/pen/eokCA (Aquí hay un ejemplo de uno de los íconos)

    <svg
    version="1.1"
    id="sun"
    class="climacon climacon_sun"
    xmlns="http://www.w3.org/2000/svg"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    x="0px"
    y="0px"
    viewBox="15 15 70 70"
    enable-background="new 15 15 70 70"
    xml:space="preserve">
    <clipPath id="sunFillClip">
        <path
        d="M0,0v100h100V0H0z M50.001,57.999c-4.417,0-8-3.582-8-7.999c0-4.418,3.582-7.999,8-7.999s7.998,3.581,7.998,7.999C57.999,54.417,54.418,57.999,50.001,57.999z"
        />
    </clipPath>
    <g class="climacon_iconWrap climacon_iconWrap-sun">
        <g class="climacon_componentWrap climacon_componentWrap-sun">
            <g class="climacon_componentWrap climacon_componentWrap-sunSpoke">
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-east"
                d="M72.03,51.999h-3.998c-1.105,0-2-0.896-2-1.999s0.895-2,2-2h3.998c1.104,0,2,0.896,2,2S73.136,51.999,72.03,51.999z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-northEast"
                d="M64.175,38.688c-0.781,0.781-2.049,0.781-2.828,0c-0.781-0.781-0.781-2.047,0-2.828l2.828-2.828c0.779-0.781,2.047-0.781,2.828,0c0.779,0.781,0.779,2.047,0,2.828L64.175,38.688z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-north"
                d="M50.034,34.002c-1.105,0-2-0.896-2-2v-3.999c0-1.104,0.895-2,2-2c1.104,0,2,0.896,2,2v3.999C52.034,33.106,51.136,34.002,50.034,34.002z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-northWest"
                d="M35.893,38.688l-2.827-2.828c-0.781-0.781-0.781-2.047,0-2.828c0.78-0.781,2.047-0.781,2.827,0l2.827,2.828c0.781,0.781,0.781,2.047,0,2.828C37.94,39.469,36.674,39.469,35.893,38.688z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-west"
                d="M34.034,50c0,1.104-0.896,1.999-2,1.999h-4c-1.104,0-1.998-0.896-1.998-1.999s0.896-2,1.998-2h4C33.14,48,34.034,48.896,34.034,50z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-southWest"
                d="M35.893,61.312c0.781-0.78,2.048-0.78,2.827,0c0.781,0.78,0.781,2.047,0,2.828l-2.827,2.827c-0.78,0.781-2.047,0.781-2.827,0c-0.781-0.78-0.781-2.047,0-2.827L35.893,61.312z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-south"
                d="M50.034,65.998c1.104,0,2,0.895,2,1.999v4c0,1.104-0.896,2-2,2c-1.105,0-2-0.896-2-2v-4C48.034,66.893,48.929,65.998,50.034,65.998z"
                />
                <path
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunSpoke climacon_component-stroke_sunSpoke-southEast"
                d="M64.175,61.312l2.828,2.828c0.779,0.78,0.779,2.047,0,2.827c-0.781,0.781-2.049,0.781-2.828,0l-2.828-2.827c-0.781-0.781-0.781-2.048,0-2.828C62.126,60.531,63.392,60.531,64.175,61.312z"
                />
            </g>
            <g class="climacon_componentWrap climacon_componentWrap_sunBody" clip-path="url(#sunFillClip)">
                <circle
                class="climacon_component climacon_component-stroke climacon_component-stroke_sunBody"
                cx="50.034"
                cy="50"
                r="11.999"
                />
            </g>
        </g>
    </g>
</svg><!-- sun

Funciona muy bien en cromo. Pasé un tiempo tratando de depurar Firefox hasta que me di cuenta de que incluso su ejemplo está en mal estado en ese navegador. No sé mucho sobre SVG, así que si alguien tiene algunos consejos, sería genial. Estoy empezando a inclinarme hacia la elección de un conjunto diferente de iconos del clima. Gracias por la ayuda por adelantado