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Optimizely Knowledge Base

Supported browsers for Optimizely

relevant products:
  • Optimizely X Web Experimentation, Personalization, and Recommendations
  • Optimizely Classic

THIS ARTICLE WILL HELP YOU:
  • Identify which browsers Optimizely supports, which can be handy for quick troubleshooting
  • Ensure that your experiments and campaigns look and work as expected

When you’re designing experiments, you need to know that the features you depend on will work as expected. If an experiment looks or runs differently than you expect, it might be a browser support issue.

Read on to learn which browsers are supported by Optimizely and what factors we consider when making decisions about browser support.

Optimizely X Web

Here are the browsers that Optimizely X Web supports.

Desktop:

  • Current version of Google Chrome
  • Recent versions of Mozilla Firefox
  • Apple Safari 6+
  • Microsoft Edge
  • Microsoft Internet Explorer 10+
  • Opera 15+

Mobile:

  • Android Chrome
  • Apple Mobile Safari 6+
  • Microsoft Internet Explorer 10+
  • Opera 15+

Optimizely X also has a couple more browser requirements:

  • Support for localStorage is required Optimizely X Web (used for features like persistence of visitor, session, campaign states, and visitor events)

  • Support for cross-domain XMLHttpRequest is also required (used for tracking events)

Optimizely Classic

Here are the browsers that Optimizely Classic supports.

Desktop:

  • Current version of Google Chrome
  • Recent versions of Mozilla Firefox
  • Apple Safari 6+
  • Microsoft Edge
  • Microsoft Internet Explorer 8+
  • Opera 15+

Mobile

  • Android Chrome
  • Apple Mobile Safari 6+
  • Microsoft Internet Explorer 8+
  • Opera 15+

Optimizely doesn't intentionally disable the Optimizely Classic client (except for Internet Explorer versions before 8), but certain features won’t work if the browser doesn’t support the underlying technology.

Here are the factors behind which features are supported: