Hi Ben

The bottom address bar is currently unavailable as we are testing an improved version of the tab strip. This change is part of our ongoing efforts to enhance the overall browsing experience based on user feedback and design research.

We understand this may impact your workflow, and we really appreciate your patience while we work to make things better. Your feedback is important to us, so please don’t hesitate to share any thoughts or suggestions at https://connect.mozilla.org/

You're testing things in a public release? Sheesh. Glad I'm not in the software support game anymore if this is what developers are doing.