Mozilla applications gained support
<canvas> starting with Gecko 1.8 (Firefox 1.5). The element was originally introduced by Apple for the OS X Dashboard and Safari. Internet Explorer, prior to version 9.0 beta, does not support
<canvas>, but a page can effectively add support for it by including a script from Google's Explorer Canvas project. Opera 9 also supports
width- The width of the coordinate space in CSS pixels. Default is 300.
height- The height of the coordinate space in CSS pixels. Default is 150.
- See Global HTML Attributes for more.
The canvas is used as an area to draw on, but by itself does not have a visual appearance.