getElementById method as well as
screenPixelToMillimeterY properties will be removed from the
At the same time, the
hasExtension method will be removed from the
SVGTests interface, while the
farthestViewportElement properties will be removed from the
Update: The latest SVG spec has restored the
getElementById method so it won’t be removed from Firefox.
pixelUnitToMillimeterX and similar properties have been removed with Firefox 61.