In web development, a lot of times you want to avoid your browser caching messing up different sessions. Luckily most browser have some sort of an incognito modus now a days. I myself use Google Chrome the most while developing in ADF.
There is a command line start up parameter to start Google Chrome in incognito modus, a great feature in JDeveloper is that you can set these command line parameters.
If you navigate to your preferences and go to the tab Web Browser and Proxy:
Here you see I've added the command '--incognito' as Application Command Line Parameter. That's all it takes, if you now run your web application, it should start an incognito window.
Notice the symbol of the incognito browser in the left top of your browser window: