I’m talking about a small Firefox extension from the unmatched Stephen Clavering, specifically. I have used it before, but the 0.8-1.0 upgrade for Firefox way back in the day broke it, and I hadn’t looked for a new version since. It
[a]malgamates the progress bar and the Location bar, in the style of the Safari Web browser for MacOS X, which is all it does. It’s just one of those little things that make me inexplicably happy.