Alert → Kaspersky Password Manager is slowing down Firefox. To speed up your browser, stop that extension.
Firefox 89.0.2 (64-bit)
KPM 22.214.171.12499 (p) / 1624377209_6917 / 1.0.363.0-0.8.3.0_1
Despite being a known issue, according to: Password Manager ralenti Firefox & " Kaspersky Password Manager " sta rallentando Firefox. Si consiglia di bloccare l'estensione per velocizzare il browser, Kaspersky Technical Support claim to know nothing about it; their “solution”: “disable the extension”
Best answer by Anton Mefodys
We expect fix of this issue in new version of KPM plugin (in ~ a week).
new version of the KPM extension has been released. It’s vesion 126.96.36.199