Whenever starting the browser with the default command for opening the preferred browser:"exo-open --launch WebBrowser" it starts up on a tab "file:///home/user/%u which as far as I'm concerned doesn't exists. The expected result would be the "New tab" tab, but it instead tries to open, unsuccessfully that file. Perhaps there's an issue on my behalf, but it works just fine in other browsers: firefox and chromium so i decided to report it here.