Technically it’s not browser tolerance but spec tolerance. It’s built into the html5 spec to tolerate different tags closing and other things invalid in xml.

This was an important design that grew out of one of the largest failings of xhtml that such failures would make the entire page unrenderable.

I was being sarcastic because really it doesn’t have a tool with explicit features, just a workaround using a couple features together.

For a new user it’s very difficult to do a pretty basic task.

It does! And it’s so easy to use.

• Draw a circle with the ellipse selection tool
• From the edit menu choose “stroke selection” and follow the dialogs
• Remove your selection

It’s so obvious I can’t imagine why anyone would be confused.