When i click on a link in an email it shuts down Daily and it won't reopen without rebooting

Several things... Daily is alpha quality software. it contains the latest fixes, but there is no guarantee that is will even start as it is the development build. So why are you using a development build? This is not rally the place to discuss issues with ongoing development. You would be better served filing a bug in [https://bugzilla.mozilla.org/ Bugzilla ]so the developers become aware that there is an emerging issue Finally have you gone through the "standard diagnostics"? * [https://support.mozilla.org/kb/use-troubleshooting-information-page-fix-firefox#w_accessing-the-troubleshooting-information-page Finding the Troubleshooting information] *Does Thunderbird work in TB Safe mode (see [http://mzl.la/1k5DWjq Thunderbird Safe Mode])? *Does Thunderbird work correctly in your operating systems safe mode (With networking)