There are a couple of different ways to hide/show the address bar (omnibox) in Wavebox.

Right-click in the top toolbar and select 'Hide Address Bar'.  Once hidden, you can access the browser controls (back, forward) by hovering over the grey back button in the top toolbar.

To get it back, right-click on the top toolbar and select 'Show address bar'.

Or you can click on 'Settings' cog at the bottom of the sidebar, and under 'User Interface' at the very top, look for 'Show Address Bar'.  Then toggle the switch accordingly.

Functions of the address bar:

  1. Search: The address bar is also the "search' bar for Wavebox.  Start typing a keyword in the address bar (e.g. trello) to quickly navigate to that app in Wavebox.  The search dropdown lists places in Wavebox before the Google search results.
  2. Adding an App: the address bar is also a quick way to add a new app.  Paste your URL in the address bar, and when the site you want to add to Wavebox is in the main window, right-click on it, and select 'Open Current Page as New App'.  Voila, it's done!