1139908 - Firefox opens two empty windows when opening links in Thunderbird email

Status: UNCONFIRMED

Description

[Gustav H Meyer]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:36.0) Gecko/20100101 Firefox/36.0
Build ID: 20150224183111

Steps to reproduce:

click on any http or https link in an email


Actual results:

opens two empty Firefox windows 


Expected results:

should have opened link in Firefox tab

This annoying change in behaviour happened since upgrading to Thunderbird 31.5.0 on Kubuntu 12.04.5 LTS. 

It seems to be ignoring what is set in network.protocol-handler.app.http now and also not opening in Google Chrome when changing the default browser at the OS level. 

Also, when changing network.protocol-handler.warn-external.http to True it does not ask which browser to use.

Comment 1

[Gustav H Meyer]

have also tried disabling all addons and restarted in Safe Mode and still get the same result

Comment 2

[Wayne Mery (:wsmwk)]

bug 1139741 also reports a problem in this area

Comment 3

[piotr.skowronek]

I can confirm the behavior on OSX - clicking a link in Thunderbird opens two Firefox instances.
However, I think it is more Firefox problem.

To reproduce:
- make sure Firefox is a default browser
- make sure Firefox is not running
- in Terminal type: open http://example.org (or click a link in Thunderbird)
- observe two Firefox instances, one with a home page, and the second one with example.org.

Firefox version: 45.0.1
Thunderbird version: 38.7.1
OSX: 10.11.3

BTW, I experience this behavior since couple of years... and there are more similar bugs about it, for example: bug-531552 (regression?).