Browser support for the canvas element is available in all modern & major mobile browsers <ahref="http://caniuse.com/#feat=canvas"target="_blank">(http://caniuse.com/#feat=canvas)</a>.
Please report these on the GitHub page - at <ahref="https://github.com/chartjs/Chart.js"target="_blank">github.com/chartjs/Chart.js</a>. If you could include a link to a simple <ahref="http://jsbin.com/"target="_blank">jsbin</a> or similar to demonstrate the issue, that'd be really helpful.
Chart.js is <ahref="https://github.com/chartjs/Chart.js"target="_blank">open source</a> and available under the <ahref="http://opensource.org/licenses/MIT"target="_blank">MIT license</a>.
There are many plugins that add additional functionality to Chart.js. Some particularly notable ones are listed here. In addition, many plugins can be found on the [Chart.js GitHub organization](https://github.com/chartjs).
-<ahref="https://github.com/chartjs/Chart.Zoom.js"target="_blank">Chart.Zoom.js</a> - Enable zooming and panning on charts
-<ahref="https://github.com/chartjs/Chart.Annotation.js"target="_blank">Chart.Annotation.js</a> - Draw lines and boxes on chart area
-<ahref="https://github.com/chartjs/Chart.BarFunnel.js"target="_blank">Chart.BarFunnel.js</a> - Adds a bar funnel chart type
-<ahref="https://github.com/chartjs/Chart.Deferred.js"target="_blank">Chart.Deferred.js</a> - Defer initial chart update until chart scrolls into viewport
-<ahref="https://github.com/chartjs/Chart.smith.js"target="_blank">Chart.Smith.js</a> - Adds a smith chart type
-<ahref="https://github.com/chartjs/Chart.LinearGauge.js"target="_blank">Chart.LinearGauge.js</a> - Adds a linear gauge chart type