I'm on macOS 10.13.4 with the latest JDownloader 2 build. I'm able to get Firefox (latest build) launched for captcha solving via BrowserCaptchaSolver.browsercommandline with [ "/Applications/Firefox.app/Contents/MacOS/firefox", "-app=%s" ]. Upon launching, nothing else happens. I have the latest MyJDownloader extension installed, and I've disabled all other extensions and allowed pop-ups. Chrome acts the same way. When I removed the command line to use the default browser, Safari launches with the screen telling me that I need the MyJDownloader extension for captchas, which doesn't exist, but Firefox and Chrome don't do a thing when launched for captchas. Any help is appreciated. Thanks!