right clicking on tab and selecting new tab opens up 2 tabs

[pyrates999]

I am running Firefox 129.0 on x86-64 with TabMixPlus addon version 1.22.0.

When I right click on the currently active tab and click on New Tab (After This Tab), it will then open up 2 new tabs instead of 1 as expected.

Here is my preferences file:

TMPpref.txt

And here is the output from browser console:

TypeError: URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) TypeError: URL constructor: http://about:blank is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:blank is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) TypeError: URL constructor: http://about:blank is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:blank is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) TypeError: URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) TypeError: URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js)

But if I go to the File menu and click on New Tab, it only opens one tab as expected.

Here is the output from Browser Console:

TypeError: URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js)

It also seems to be putting http:// behind the internal url about:newtab.

[onemen]

@pyrates999, Thank you for the report.

Download this test build

Rename it to .xpi and install it.

Firefox changed in version 129 the way it trigger menu command.
I need to make sure that there is no other command that runs twice.

Report back

[pyrates999]

Ok, that didn't work at first. So I went to about:support and clicked on Clear Startup Cache.... Then it worked.

Here is the output from Browser Console:

TypeError: URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js) URL constructor: http://about:newtab is not a valid URL. [background.js:439:18](moz-extension://6656771d-6779-46b9-982f-f062d768dd02/background.js)

[pyrates999]

This could be another bug to fix where it tries to go to http://about:newtab instead of about:newtab

[pyrates999]

Thanks for the fix!

[onemen]

I don't see in my console any messages regarding about:newtab maybe it is related to another extension your are using
check in your profile for extension with id 6656771d-6779-46b9-982f-f062d768dd02

[pyrates999]

You're right. This was caused by another add-on I had installed. Thanks. Now closing this.