How to check directory trees made available to proot'ed applications? BW_BROWSER_PATH=find ./browser-wrapper /dev BW_BROWSER_PATH=bash ./browser-wrapper -c "find /dev /home -maxdepth 3 | xargs ls -aldh" How to quickly find a Flash application since they tend to disappear? Look for "Flash sample clock", it should lead you to https://www.adobe.com/devnet/actionscript/samples/time_2.html Of course, other samples are available on https://www.adobe.com/devnet/actionscript/samples.html How to quickly find a webGL demo? "WebGL Samples" looks like the right place, e.g.: http://webglsamples.org/aquarium/aquarium.html Other demos: http://nouvellevague.ultranoir.com/ http://madebyevan.com/webgl-water/ http://www.randelshofer.ch/webgl/rubikscube/ http://www.webglearth.com/ How to quickly find a Java applet since, well, you know. Looking for "java applet sample" should lead you to https://docs.oracle.com/javase/tutorial/deployment/applet/examplesIndex.html