This chart shows the market share of web browsers across a two-month period in 2015, using stacked areas to display each browser's percentage over time. It is built with D3.v4, using `d3.stack` and `d3.area` to create the stacked layers, and `d3.timeParse` to convert the date column. The data is loaded from a TSV file, with a legend labeling each layer near the right edge, and the y-axis is formatted to show percent values.