Can't log into Hotmail on Firefox anymore

Question

Can't log into Hotmail on Firefox anymore

Scott Shaeffer 10

I get the error below. I have checked internal clocks(all good) cleared cache. Hotmail/outlook will work if I use IN PRIVATE on Firefox, or if I use outlook browser but won't work in regular browsing window in Firefox. This is the error I get. Also, this happens on all my computer devices at home that use firefox.

UTC Date: 2026-03-05T12:13:19.519Z
Client Id: 82A60FD132114E6B8C5FD6E5AF8994D8
Session Id: 379b33c7-79d2-49e0-88c9-fac5974a7502
Client Version: 20260220002.10
BootResult: fail
Back Filled Errors: None
err: TypeError: TrustedTypePolicyFactory.createPolicy: Tried to create a second default policy
esrc: Script
et: ClientError
estack: 734392@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.AppBoot.m.7edf4ce7.js:39:147215
I@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mail.runtime.639086db.js:1:145
282916@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.AppBoot.m.7edf4ce7.js:21:21492
I@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mail.runtime.639086db.js:1:145
691114@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.AppBoot.m.7edf4ce7.js:39:61327
I@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mail.runtime.639086db.js:1:145
835041@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.AppBoot.m.7edf4ce7.js:42:50184
I@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mail.runtime.639086db.js:1:145
950733@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.AppBoot.m.7edf4ce7.js:42:220063
I@https://res.public.onecdn.static.microsof

Scott Shaeffer 10 Reputation points

2026-03-06T01:16:32.7433333+00:00

Mustafa, yes when I disable browser extensions Hotmail works fine. Should I add back one at a time to isolate which one is causing the issue?

Scott
Scott Shaeffer 10 Reputation points

2026-03-06T01:19:03.16+00:00

Figured it out. Extension called Scam Blocker. Will just delete that one and looks like it will work fine. THANK YOU.
MUSTAFA SALAH 1,885 Reputation points

2026-03-06T02:48:56.3933333+00:00

I am glad that you able to fix it :D

Answer recommended by moderator

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Your answer

Scott Shaeffer 10 Reputation points

2026-03-06T01:16:32.7433333+00:00

Mustafa, yes when I disable browser extensions Hotmail works fine. Should I add back one at a time to isolate which one is causing the issue?

Scott
Scott Shaeffer 10 Reputation points

2026-03-06T01:19:03.16+00:00

Figured it out. Extension called Scam Blocker. Will just delete that one and looks like it will work fine. THANK YOU.
MUSTAFA SALAH 1,885 Reputation points

2026-03-06T02:48:56.3933333+00:00

I am glad that you able to fix it :D

Answer 1

MUSTAFA SALAH 1,885

Hello Scott,

Let's try to isolate the issue (As per your description "outlook.live.com" working normal on any browser or inPrivate Windows EXCEPT Firefox)

Kindly check current browser extensions/plugs and disable them all >> then, try access the site again.
Reset Browser Settings and retry.
Check your network settings (Since, every PC you have facing same issue)
Update Firefox to latest version.

If possible, kindly share a screenshot of the error message on Firefox.

Scott Shaeffer 10 Reputation points

2026-03-10T12:43:16.75+00:00

Hi, I was able to get issue resolved. It was one of the extensions with a security platform that I use. For some reason all of the sudden Hotmail/Outlook wouldn't work with that extension turned on, so simply turned it off and notified that website of the issue.

Thanks for getting back to me.