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Why doesn't Facebook save Firefox as a trusted divice?

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Even though the browser Firefox is saved when logging in, Facebook asks to enter the code sent to the phone when logging in again after logging out. I have not set Firefox to not allow cookies or after closing Firefox to clear browsing data. And one thing I noticed is even though Firefox is saved, it does not get saved into the list of trusted devices.On Facebook. This doesn't happen only with Firefox, this happens with other browsers also, Edge, Chrome, Vivaldi also.

What can be the issue?

Even though the browser Firefox is saved when logging in, Facebook asks to enter the code sent to the phone when logging in again after logging out. I have not set Firefox to not allow cookies or after closing Firefox to clear browsing data. And one thing I noticed is even though Firefox is saved, it does not get saved into the list of trusted devices.On Facebook. This doesn't happen only with Firefox, this happens with other browsers also, Edge, Chrome, Vivaldi also. What can be the issue?

Réiteach roghnaithe

Thanks for your help.I reported the problem to Facebook by help --> Report a Problem and I think, I am not sure, they have corrected the issue.Somehow now the browsers are getting saved

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That sounds like Facebook is using a second level password protection. Contact Facebook support about this.

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How to contact Facebook support.I am not able to find a way, no contact information can be found. Can you please help

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Athraithe ag cor-el ar

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Réiteach Roghnaithe

Thanks for your help.I reported the problem to Facebook by help --> Report a Problem and I think, I am not sure, they have corrected the issue.Somehow now the browsers are getting saved

Athraithe ag varuna ar