placeholder is not moving up on focus or while entering value in textbox. Working as expected in chrome but not working in firefox 42.0.1

[krishna2404]

• Do you want to request a feature or report a bug? ==> Its a bug
• What is the current behavior? ==> Placeholder text is not moving up in textbox on edit. Working as expected in chrome but not working in firefox 42.0.1

Plunker: http://plnkr.co/edit/9orpJEw6qC1we0EE8cnz?p=preview

[davidgabrichidze]

already improved in #393, will be released in next alpha.5

[jelbourn]

Should be fixed in #393

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