If this feature is on a website, could you indicate which site you have this problem on? For example, Hotmail, SkyDrive, Yahoo, Gmail, etc. Please describe how to re-create the problem. Thanks.

If this feature is on a toolbar, perhaps that add-on needs to be updated.

I have hotmail, live.com with an extensive address book. When I am on Mozilla and on a link I wish to share with others in my hotmail address book, I used to simply click to and the address book would pop up. Now i get no addresses at all.

So I can try to replicate this, you are using Firefox's "Send Link" feature to generate a new Hotmail message?

Does the To button work normally when you compose a message from within Hotmail, or is that broken as well?

The To button works great from hotmail. My address book is intact. It's only been since updating the newer version of Firefox that this has become a problem. The newer firefox does not appear to be linked to my mail box from hotmail where the previous version was. Thanks for helping me.

Generally speaking, Firefox can't read from your email accounts. If it appeared to do that before, maybe you had an add-on or toolbar that was wired directly to Hotmail (Live.com)?

Please spell out the exact steps to re-create the problem so I can test it. How are you sending the link to a page and where it is breaking down?

From google i find a page that I like on any subject. I go to File, Send link, It takes me to an email send page but not my hotmail live email. It has no addresses. I am able to manually insert addresses and send but have to look them up if I don't know them by heart. I cannot access my email address from the link like I used to be able to.

Let's first check your Application settings.

orange Firefox button or classic Tools menu > Options > Applications

In the search box there, type or paste mailto and pause while Firefox filters the list.

In the right column, is the drop-down selector set to Hotmail or Live mail? If not, does it help to select that?

Firefox didn't used to ship with the option to connect with Hotmail / Live mail; I don't know whether that is included in recent releases. If you can't find it, it can be added in a somewhat roundabout way. While there are a lot of steps here, none of them is very tricky.

First, in order to add a new "handler" for email, you need to relax a restriction that protects you from sites randomly adding new handlers.

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the filter box, type or paste gecko and pause while the list is filtered

(3) Double-click gecko.handlerService.allowRegisterFromDifferentHost to change its value from false to true. If it's already true, no need to change.

Next, you will run a little script to add the new handler. Keep about:config open, and:

(4) In a new tab, open the Web Console using one of these methods:

Ctrl+Shift+k
orange Firefox button > Web Developer > Web Console
classic Tools menu > Web Developer > Web Console

A small area should open above the new tab page.

(5) Copy the following line of script and paste it next to the caret (">") at the bottom of the Web Console (it all goes on one long line):

navigator.registerProtocolHandler('mailto','http://mail.live.com/secure/start?action=compose&to=%s','Live Mail'); 

Then press the Enter key to execute it.

(6) An information bar should appear below the address bar asking your permission to add the handler. Click "Add Application".

You're done adding the handler, it's time to test whether it works.

(7) Return to your application options dialog, filter on mailto, and select Use Live Mail. OK out.

(8) Open a page and test: does Send Link now get you directly into Hotmail with full functionality?

Finally, turn the handler adding restriction back on.

(9) In the about:config tab, double-click gecko.handlerService.allowRegisterFromDifferentHost to change its value from true back to false. You can close this tab now.

Any luck?