To increase your website’s usability, you should avoid the use of special types of web content such as Flash, Java or Silverlight. Sometimes these plugins will cause your website to hang or crash and may also cause security incidents in browsers. Furthermore, many browsers restrict such plugins.

Internet Explorer runs without plugins in Windows UI mode.

Chrome intends to remove most plugins.

Firefox will prompt users before running most plugins.

There are many web technologies that can substitute these plugins now and will not cause your website to hang or crash.