Thank you for your feedback. I tried, but the issue wasn't resolved, so I've created a ticket. Additionally, there's an error in the Firefox extension installation process. Here's how you can potentially help others:
In Kaspersky's own documentation, they provide this link for the Firefox extension: https://browser-plugins.s.kaspersky-labs.com/kpm/extension/firefox/kaspersky_password_manager-24.0.128.1-fx.xpi, but the extension file in this link doesn't work. It simply opens as faulty and doesn't establish a connection.
When you try to download the extension in Kaspersky Password Manager for MacOS, it redirects you to "https://click.kaspersky.com/?hl=tr&link=kpmmac_Firefox&pid=kpmmac&version=10.2.0.42," which is also incorrect.
To solve this, you can change the "tr" part in the link to "en" or "ru," and then you can download and use the extension.
For example: https://click.kaspersky.com/?hl=en&link=kpmmac_Firefox&pid=kpmmac&version=10.2.0.42