User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:49.0) Gecko/20100101 Firefox/49.0 Build ID: 20160922113459 Steps to reproduce: A border-style of anything but solid, so dotted for example, becomes solid in the curved part of an element with border radius. Example: https://jsfiddle.net/oxr51opa/ Actual results: On an element with border-style:dotted and border-radius:50%, the border looks completely solid. border-width appears to make no difference either. Expected results: Should look dotted, just like on Chrome and Edge.
It's fixed in the next release (v50).