If you click the Add Application button, "Yahoo!" is added as an option under Options - Applications - mailto.
At that point, you normally never see the prompt again, unless you delete your current mimeTypes.rdf file or you create a new Firefox profile. If for some reason you want to hide the prompt either on Yahoo! or on all sites, read on.
The easy way
- Install Stylish and restart Firefox when prompted.
https://addons.mozilla.org/firefox/addon/stylish/ - Open the Add-ons Manager (Ctrl+Shift+A; Mac: Command+Shift+A), then the User Styles category.
- Click the Write New Style button at the top. Paste either of the following in the text box, give the style a name, then click the Save button.
Code: Select all
@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
/*
Title: Yahoo! Mail - hide "add as an application for mailto links" notification
Author: http://forums.mozillazine.org/memberlist.php?mode=viewprofile&u=261941
Tested on: Firefox 28, Firefox 31
*/
notification[label^="Add Yahoo!"][value="Protocol Registration: mailto"] {
display: none !important;
}Code: Select all
@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
/*
Title: Hide "add as an application for mailto links" notifications
Author: http://forums.mozillazine.org/memberlist.php?mode=viewprofile&u=261941
Tested on: Firefox 28, Firefox 31
*/
notification[value="Protocol Registration: mailto"] {
display: none !important;
}
If you don't want to install Stylish, you can put either style in the userChrome.css file instead. Make sure the first line of the style only appears once in that file.
http://kb.mozillazine.org/UserChrome.css
