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Browser support standards

This policy applies to web browsers that are being used on desktop versions of Windows, Mac OS and Linux/Unix.

We have a separate mobile site  for use by mobiles.

Web browser support

The Met Office public web site has been developed to comply with the World Wide Web Consortium (W3C) AA Accessibility standards.

We have tested our site using the browsers given in the list. The various browsers are allocated a 'Level of Support' as described below.

'Levels of support' definitions Browsers

Supported browsers

  • All content MUST be readable and useable and all functionality MUST work;
  • Variations to presentation of content MUST be minimised;
  • Where CSS layout is used, the CSS MUST be rendered by supported web browsers, so that a fully-styled version of the page is presented to the user;
  • Internet Explorer 11
  • Chrome (latest two versions)
  • Firefox (latest version)
  • Safari 10

Unsupported browsers

  • No support or testing necessary.
  • All web browsers not specifically listed in the supported browsers section are unsupported.
  • Internet Explorer 10 and earlier
  • Chrome (any earlier version)
  • Firefox (any earlier version)
  • Safari (any other version)
  • Opera (any version)

Note: We do not support Beta versions of any web browser.

Decision tree

Probably unsupported

  • Browser is not actively supported by the manufacturer; or
  • less than 1% of site users; or
  • upgrade has been available for more than 3 years and less than 2% of users; or
  • significantly behind standards or adds significantly to development time and less than 2.5% of users; or
  • new browser and less than 5% of site users.

Probably partially supported

  • Less than 2% of site users; or
  • upgrade has been available for more than 3 years and less than 4% of users; or
  • significantly behind standards or adds significantly to development time and less than 5% of users.

Probably supported

  • All of the above statements are not true; or
  • strategically supported browser; or
  • new browser and more than 5% of site users.

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