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mailto opening multiple browsers

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Hello, Clicking a mail to link/icon etc. is causing my entire browser to crash - it opens up multiple windows and I lose the pages I was one, and can't do anything. This is a nightmare for a marketers - especially in the age of social media where it's all about sharing things. It's as bad as not being able to connect to Twitter or Facebook from Firefox. I may be able to fix this for myself, but what about the thousands and thousand of people I'm marketing to and asking to take this action? It's like spreading a virus - some people will think it's malware that I'm spreading. Can you guys fix this? It's a huge problem. Thanks

https://bugzilla.mozilla.org/show_bug.cgi?id=510009 / https://bugzilla.mozilla.org/show_bug.cgi?id=194210
Hello, Clicking a mail to link/icon etc. is causing my entire browser to crash - it opens up multiple windows and I lose the pages I was one, and can't do anything. This is a nightmare for a marketers - especially in the age of social media where it's all about sharing things. It's as bad as not being able to connect to Twitter or Facebook from Firefox. I may be able to fix this for myself, but what about the thousands and thousand of people I'm marketing to and asking to take this action? It's like spreading a virus - some people will think it's malware that I'm spreading. Can you guys fix this? It's a huge problem. Thanks https://bugzilla.mozilla.org/show_bug.cgi?id=510009 / https://bugzilla.mozilla.org/show_bug.cgi?id=194210

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That Bug report was RESOLVED WORKSFORME - the user who filed that Bug fixed his "mailto" configuration parameter and solved his issue.

What is mailto set to use in the Applications tab of Preferences?

As far as social networking and "share" features, see this: https://support.mozilla.org/en-US/kb/share-webpage-through-firefox-share and this https://support.mozilla.org/en-US/kb/add-social-features-firefox-sidebar