The latter. The buildings on the right are constructed under a shelf of rock - on the left, they’ve built up to meet that shelf.

FF is my daily driver for personal use and my secondary at work - mostly used to monitor my corporate email and Teams. I’m using a client’s laptop and they mandate Edge for internal use so I can keep my O365 sessions rubbing in different browsers.

My one gripe with FF is that Teams calls don’t work - you can join a meeting, but try calling someone out have then call you it goes straight to voicemail…