Browser Compatibility Testing of CSS Variables (Custom Properties)

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CSS Variables (Custom Properties)
CSS Variables (Custom Properties)

CSS Variables (Custom Properties)

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BROWSER SUPPORT FOR CSS Variables (Custom Properties)

Google Chrome

CSS Variables (Custom Properties) is not compatible for Chrome browser 4 to 48. Chrome 49 to 67 partially supports this browser property.

Mozilla Firefox

CSS Variables (Custom Properties) is not supported for Firefox 2 to 30. Firefox 31 to 60 supports this browser.

Internet Explorer

IE browser version 6 to 11 doesn't support this browser element.


Safari browser 3.1 to 9 doesn't support this web element. Safari 9.1 to 11.1 supports this property.

Microsoft Edge

CSS Variables (Custom Properties) element is not supported by Microsoft Edge browser 12 to 14. Edge 15 partially supports this browser property. Later Edge version 16 and 17 support this browser element.


Opera browser 10.1 to 35 doesn't supports this property. This property is supported for Opera 36 to 53.

Information sourced from

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

  • Google Chrome
  • Mozilla
  • Edge
  • IE
  • opera
  • Safari
  • Yandex

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