browser-switch
· Android Browser Switch makes it easy to open a url in a browser or Chrome Custom Tab and receive a response as the result of user interaction, either cancel or response data from the web page.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window browser-switch-1.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.