[KIS 2021 anti-banner plus Firefox plus Youtube = Can't sign out [moved]]

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 Same here, since i installed KIS 21.1.15.500 the issue with youtube appeared.

Access the YouTube page, click the SIGN IN button, and, although it looks like I am signed in when i click the account button it looks like this

 

 

As described above nothing works to fix the issue, I have to exit Kaspersky internet security entirely, clear cookies/cache, restart Firefox and after that is working again.

Here is how it looks when kaspersky is disabled and YouTube is working as it should

 

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[Can't manage my playlists and add comments on youtube when Kaspersky is running]

Same here, since i installed KIS 21.1.15.500 the issue with youtube appeared.

Access the YouTube page, click the SIGN IN button, and, although it looks like I am signed in when i click the account button it looks like this

 

 

As described above nothing works to fix the issue, I have to exit Kaspersky internet security entirely, clear cookies/cache, restart Firefox and after that is working again.

Here is how it looks when kaspersky is disabled and YouTube is working as it should