For more context information, please read through the

[release notes](https://github.com/plotly/plotly.js/releases).

First fully open source release.

- Add 2D WebGL plot engine

- Save to cloud is now done via a modebar button by default,

the `'Edit chart'` link is still available through the

`'showLink'` plot config.

- Better double-click notifier CSS

- Fix `Plotly.newPlot` 3D and geo bug.

- Fix `plotly_click` event bug in latest Chrome and Firefox.

- Different plot types cannot be mixed in subplots.

- 2D WebGL has no image test support.

- Click and hover events are not hooked for gl3d, geo and gl2d

plot types.

- Polar chart are under-developed.