Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

সহায়তা খুঁজুন

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

আরও জানুন

Missing network.protocol-handler.external-default

  • 3 উত্তরসমূহ
  • 1 এই সমস্যাটি আছে
  • 20 দেখুন
  • শেষ জবাব দ্বারা Toad-Hall

more options

In Fedora 32, I use Thunderbird 68.8.0. I have replaced Firefox with Firefox Developer Edition.

When I try to follow a link, thunder bird complains: `Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile.`

In the troubleshooting section I looked for : network.protocol-handler.external-default but I couldn't find this line.

How can I add this line to my profile?

In Fedora 32, I use Thunderbird 68.8.0. I have replaced Firefox with Firefox Developer Edition. When I try to follow a link, thunder bird complains: `Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile.` In the troubleshooting section I looked for : network.protocol-handler.external-default but I couldn't find this line. How can I add this line to my profile?

All Replies (3)

more options

The entry is of type boolean and it accepts true or false as its values, so right-click inside the config editor, select new then boolean. It should be straight-forward from there.

more options

network.protocol-handler.external-default has been added to the preferences (with the value 'true') but when I inspect the 'important changes' section in troubleshooting Thunderbird, I can't see any changes.

Following a link in Thunderbird still results in the error.

more options

I note you mention replaced Firefox with Firefox Developer Edition and not beta etc. I found this bug report:

So was wondering if this has something to do with enabling DBus remote for X11 for Wayland as per comment 31 in bug report.