Hi, Firefox has a limited knowledge of what to do with email links. If you check the steps in the following article, can you direct Firefox to Xfinity in your regular mail reader: [[Change the program used to open email links]] If you read your Xfinity mail in a tab in Firefox, and it's not listed as an option, one possible way to add it would be a bar that appears when you use Xfinity that mentions adding the site as an email application. I don't now whether Xfinity has that feature.