SVG pattern not visible only on Firefox - firefox

Question

My pattern is in Firefox not visible:
Top: Chrome
Bottom: Firefox
Svg Code (but please down a bit to see the image)
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" enable-background="new 0 0 120 120" version="1.1" viewBox="0 0 120 120" xml:space="preserve">
<style type="text/css">
.st0{fill:none;}
.st1{opacity:0.48;}
.st2{fill:#FFF99A;}
.st5{fill:url(#a);stroke:#007BFF;stroke-width:0.5;stroke-miterlimit:10;}
</style>
<pattern id="b" y="120" width="200" height="200" overflow="visible" patternUnits="userSpaceOnUse" viewBox="0 -200 200 200">
<rect class="st0" y="-200" width="200" height="200"/>
<rect class="st0" y="-200" width="200" height="200"/>
<g class="st1">
<rect class="st2" y="-100" width="200" height="100"/>
</g>
<g class="st1">
<rect class="st2" x="100" y="-200" width="100" height="200"/>
</g>
</pattern>
<pattern id="a" xlink:href="#b" patternTransform="matrix(.014142 -.014142 -.014142 -.014142 -16028 -559.29)">
</pattern>
<path class="st5" d="m87.5 87.5v23.1c0 3.5-2.6 6.4-6.1 6.8-21.7 2.6-42.3 0-50.3-1.2-2.1-0.3-3.6-2.1-3.6-4.2 0-5.6 0.1-16.7 0.5-24.4h23.5"/>
</svg>
Any idea why?
I found this question, but it really didn't change anything.

Answer 1

I've removed the pattern #aand now it works in FF too
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" enable-background="new 0 0 120 120" version="1.1" viewBox="0 70 120 65" xml:space="preserve">
<style type="text/css">
.st0{fill:none;}
.st1{opacity:0.48;}
.st2{fill:#FFF99A;}
.st5{fill:url(#b);stroke:#007BFF;stroke-width:0.5;stroke-miterlimit:10;}
</style>
<pattern id="b" y="120" width="200" height="200" overflow="visible" patternUnits="userSpaceOnUse" viewBox="0 0 200 200" patternTransform="matrix(.014142 -.014142 -.014142 -.014142 -16028 -559.29)">
<rect class="st0" width="200" height="200"/>
<rect class="st0" width="200" height="200"/>
<g class="st1">
<rect class="st2" y="100" width="200" height="100"/>
</g>
<g class="st1">
<rect class="st2" x="100" width="100" height="200"/>
</g>
</pattern>
<path class="st5" d="m87.5 87.5v23.1c0 3.5-2.6 6.4-6.1 6.8-21.7 2.6-42.3 0-50.3-1.2-2.1-0.3-3.6-2.1-3.6-4.2 0-5.6 0.1-16.7 0.5-24.4h23.5"/>
</svg>

Answer 2

It's a bug in Firefox that affects patterns with viewBox x,y values that aren't 0 0.
So to fix this SVG replace the y value from the pattern's viewBox with 0 (viewBox="0 -200 200 200" -> viewBox="0 0 200 200"), and wrap the pattern contents in <g transform="translate(0, 200)"> which offsets the viewBox change.
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" enable-background="new 0 0 120 120" version="1.1" viewBox="0 0 120 120" xml:space="preserve">
<style type="text/css">
.st0{fill:none;}
.st1{opacity:0.48;}
.st2{fill:#FFF99A;}
.st5{fill:url(#a);stroke:#007BFF;stroke-width:0.5;stroke-miterlimit:10;}
</style>
<!-- remove negative -200 from viewBox -->
<pattern id="b" y="120" width="200" height="200" overflow="visible" patternUnits="userSpaceOnUse" viewBox="0 0 200 200">
<!-- wrap pattern contents with a group, offsetting the y value removed from viewBox -->
<g transform="translate(0, 200)">
<rect class="st0" y="-200" width="200" height="200"/>
<rect class="st0" y="-200" width="200" height="200"/>
<g class="st1">
<rect class="st2" y="-100" width="200" height="100"/>
</g>
<g class="st1">
<rect class="st2" x="100" y="-200" width="100" height="200"/>
</g>
</g>
</pattern>
<pattern id="a" xlink:href="#b" patternTransform="matrix(.014142 -.014142 -.014142 -.014142 -16028 -559.29)">
</pattern>
<path class="st5" d="m87.5 87.5v23.1c0 3.5-2.6 6.4-6.1 6.8-21.7 2.6-42.3 0-50.3-1.2-2.1-0.3-3.6-2.1-3.6-4.2 0-5.6 0.1-16.7 0.5-24.4h23.5"/>
</svg>
Looks like it has been reported here https://bugzilla.mozilla.org/show_bug.cgi?id=1193586