Are you using an add on? https://addons.mozilla.org/en-US/fire.../email-link-button/ Once you attach the accounts and check the credentials on your operating system it should work.

However, if you would like to change what happens try these steps: https://support.mozilla.org/en-US/kb/change-program-used-open-email-links

paulwileman said

Emailing links directly from firefox using my business email used to be easy but now using windows 8 (and currently firefox v 34.0.5) I keep getting sent to a page requesting that I add my email account (exchange, office 365). However when I do this it just says that this account is already added and does not give me any other options. I have also tried adding Outlook and Exchange active sync and the result is the same. Can anyone advise please? If I open the same pages in internet explorer I can email the link without any issues but firefox is my preferred browser.