1366126 - Iframes now auto-scale SVG content to fit, unlike every other browser

Status: RESOLVED DUPLICATE of bug 1342800

(Core :: SVG, defect)

Description

[Stephen Hicks]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.47 Safari/537.36

Steps to reproduce:

echo '<iframe src="rect.svg"></iframe>' > /tmp/rect.html
cat > /tmp/rect.svg <<EOF
<?xml version="1.0" encoding="utf-8"?>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" baseProfile="full"
    width="400px" height="400px" viewBox="0 0 100 100">
  <rect id="rect" width="50" height="50" fill="blue"/>
</svg>
EOF
firefox file:///tmp/rect.html


Actual results:

As of Firefox 53, the iframe has its content scaled (down) to fit.  If the width and height are smaller (e.g. 100px) it will scale up instead.


Expected results:

The iframe content should be unscaled, with scroll bars if the iframe is too small for the content.  This is the behavior in earlier versions of Firefox and in all other desktop browsers (Chrome, Edge, and Safari).  There was no mention of any change in behavior in the changelogs (as far as I could find).