User-Agent: Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040207 Firefox/0.8 In plain Mozilla, you could use mozilla -mail news:whatever to open a newsgroup if it isn't running, and mozilla-xremote-client 'openURL(news:whatever)' if it is. In Thunderbird, the former works, but the latter only makes an error pop up. So, there seems to be no way to make a script to associate Thunderbird with the news: protocol. (mumble stupid xremote kludge mumble mumble...) Reproducible: Always Steps to Reproduce: 1. Start Thunderbird. 2. mozilla-xremote-client 'openURL(news:whatever)' Actual Results: Error launching browser window:TypeError: Components.classes['@mozilla.org/appshell/component/browser/instance;1'] has no properties Expected Results: Well, I don't care if that exact command works, but there needs to be some way to open a news: URL in a running Thunderbird instance. I'm using Thunderbird 0.5 Linux+GTK2 on Fedora Core 1.

*** This bug has been marked as a duplicate of 101169 ***

Bug 101169 is a Mozilla bug. This works in Mozilla but not in Thunderbird, so I'm reopening. By the way, when thunderbird isn't running, it would be nicer if I could say 'thunderbird news:...' instead of 'thunderbird -mail news:...'. That also works in Mozilla but not Thunderbird.

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Yeah, mozilla-xremote-client -a thunderbird 'openURL(news:whatever)' basically works as expected now. There are some issues with dialogs popping up multiple times, but I'll call this fixed.

We don't know what fixed this worksforme