You didn't look for an answer to your question at all before posting here.

I know this because if you google the words 'change email firefox', this is the first result you get:

https://support.mozilla.org/en-US/kb/change-program-used-open-email-links

Please try to do that in the future.

Hi, open Options (cog wheel) - in the 3-bar menu unless you've moved it > Applications tab > mailto, and select or browse to your email account.

Hope that helps to answer your question.

The above was "sort of helpful" and I don't appreciate your reprimand in the first reply. I hope you are a machine because your first answer was rude and not very helpful.

I want to use the email address

mxxxxxx@q.com. I can not find it when I use your directions above. I did try the second suggestion.

The mailto: protocol automatically asks you what you want to use when clicking mailto: links. Default for me in Ubuntu is Thunderbird.

You can't exactly use your e-mail address to do this directly from Firefox (Firefox isn't a e-mail application) but you need to actually log-in to your CenturyLink account and copy/paste the recipient e-mail address,

Another thing you can do is sync your CenturyLInk mail to Thunderbird then when you want to use mailto:, you can choose Thunderbird with ease.

• https://www.mozilla.org/en-US/thunderbird/