FoxOne

One line for everything

FoxOne merges the Firefox tab bar, URL bar and navigation buttons into a single toolbar row. The browser chrome shrinks to one line, and every website gets the vertical space back that a second and third bar would normally take.

A URL bar that stays out of the way

The address bar shows only the page address by default and reveals its icons when you hover or type. What is usually a row of permanent buttons becomes a clean line that expands on demand.

Pure userChrome.css

The whole theme is one userChrome.css stylesheet plus an optional userContent.css for Firefox's internal pages – no extension, no background process, nothing phoning home. Toggles let you switch individual features on and off without touching the rest of the stylesheet. Every surface uses the warm Gruvbox palette, tuned for readability on Windows. All colors are exposed as CSS variables, so swapping in your own scheme is an edit at the top of one file.