Article ID: 2445851 - View products that this article applies to.
The SuperPreview feature in Microsoft Expression Web 4.0 supports the following web browsers on your computer:
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If you have updated Firefox to a version that is not supported by Expression Web 4.0, you can re-enable Firefox support by installing a previous Firefox version to a different directory.
Also, you can disable the auto-update functionality in Firefox to make sure that Firefox does not auto-update to a newer, unsupported version.
To disable the auto-update functionality in Firefox, follow these steps:
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.