How to add a Kaspersky root certificate to the Mozilla Firefox or Thunderbird certificate storage

Latest update: June 03, 2024 ID: 14620
 
 
 
 
Show applications and versions that this article concerns
  • Kaspersky Standard, Plus, Premium
  • Kaspersky Security Cloud
  • Kaspersky Internet Security
  • Kaspersky Anti-Virus
  • Kaspersky Total Security
  • Kaspersky Small Office Security
  • Kaspersky Free
 
 
 
 
These instructions are applicable only for Windows 7.

Browsers use root certificates to check the security and authenticity of websites and to encrypt data transmitted between the user's browser and a website.

Many third-party applications and browsers, such as Google Chrome, use root certificates from the system store of the operating system. Some applications use their own certificate stores, such as Thunderbird and Firefox version 115 or lower installed on Windows 7.

During installation of a Kaspersky application, a Kaspersky root certificate is added to the certificate system store. To prevent errors of encrypted traffic control, the Kaspersky application reconfigures Firefox and Thunderbird to use the certificate system store. Thus, before connecting, the browser verifies a website using certificates from the system store, where the Kaspersky application certificate is located.

If the browser uses the Mozilla certificate storage, you should add the Kaspersky root certificate to the system store manually using the guide below. Otherwise, the browser will be unable to open HTTPS-pages.

 
 
 
 

How to add a Kaspersky root certificate to the Mozilla Firefox or Thunderbird certificate store

 
 
 
 

How to manually reconfigure Mozilla Firefox and Thunderbird to make them use the certificate system store

 
 
 
 
 
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