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Every time I open outlook.office.com in my browser on Windows 10, I get the message: enter image description here

I have to close that manually every time. How can I turn that message off permanently?

And no, I don't want outlook.office.com to be my application for mailto links.

I am using Firefox 89.0.2 (64-bit).

NZD
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1 Answers1

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The comments in https://superuser.com/a/370235/478867 read:

This recently just happened to me, after over 15 years of using it. Changing network.protocol-handler.external.mailto to false seems to have worked for me. – Asinine Sep 21 '20 at 21:12

This did the trick for outlook365 and FF 89. – Alfabravo Jul 7 at 14:01

I am using ff 89 and when I changed network.protocol-handler.external.mailto to false in about:config, the pop-up doesn't come up anymore when I refresh the page.

It still works for ff 124.

The drawback of this solution is that any association with mailto links stops working too.

NZD
  • 2,818