No, it doesn't have any relation to the extension. This year web browsers started to replace logic with protocol format, so ":" is removed by the browser if you have previous version of the extension and new version of the browser. To make it work with lastest version of the browser and the extension you also need to install beta version of the Potplayer https://t1.daumcdn.net/potplayer/beta/PotPlayerSetup64.exe