The error message means you are trying to install into Firefox, but webmail is for Thunderbird.
Read the FAQ "How to install". http://webmail.mozdev.org/faq.html --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Thunderbird Webmail Extension" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/thunderbird-webmail-extension?hl=en -~----------~----~----~----~------~----~------~--~---
