Suppose, that you have an <SVG> element with large content, larger than the
<svg> element's viewport.

When you call getClientBoundingRect() method on that SVG element, in some
cases
(not always) it returns the coordinates of <SVG> element's content, not
viewport, as if viewport didn't exist.

Also, when you select <svg> element with tools -> web developer ->
inspector or
firebug, it highlights the size of content not the size of element's viewbox
(i.e. if content is larger than viewbox, it highlights larger space).

In order to reproduce the bug, see this example on stackoverflow:
http://stackoverflow.com/questions/29423097/javascript-svg-
getclientboundingrect-returns-coordinates-of-svg-content-inste

src:iceweasel has been superseded by src:firefox-esr in version
45.0esr-1 in March 2016. Transitional packages to ease upgrades were
provided in the wheezy, jessie, stretch and buster releases. The
transitional packages have been removed finally before the bullseye
release in August 2021.
After regular security support for buster ended in August 2022 and LTS
support ended in June 2024, I'm closing the remaining bug reports now.

Andreas