This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
This bug is opened on behalf of David Walp, based on http://lists.w3.org/Archives/Public/public-webapps/2014OctDec/0505.html Original comment: Standardizing something not used that is not in anyone's interest.
Chrome wasn't interested in removing this.
Note that I've marked this as dependent on issue 27518, as the whole issue may become moot based on the resolution of that bug.
So as far as I can tell Internet Explorer does support this quirk. However, they do not support it for relative input. file:///D|/ with no base URL becomes file:///D:/ C:/ with file:///D:/ becomes file:///C:/ C|/ with file:///D:/ becomes file:///D:/C%7C/ It's the last one that Chrome and Internet Explorer do differently. It's somewhat unfortunate David Walp cannot be copied here.
Decided to leave this as-is for now. Not sure why we'd special case this in this way. Seems more like a bug than a feature.