quick escape button

I need to install a ‘quick escape’ button (preferably using a floating sidebar on the right hand side of every page) that will take the visitor immediately to something like a google search page
It is for a website that users may need to exit quickly as its to access sensitive information
I can’t find one so if one exists, and I’m not techy so it needs to be plug and play, can you point me to it?
If not is anyone able to create one for me ??