diff --git a/docs.it4i/general/obtaining-login-credentials/obtaining-login-credentials.md b/docs.it4i/general/obtaining-login-credentials/obtaining-login-credentials.md
index 94831e51944c3207372e57f70d02eaa0e2869eae..c1c6391321c8699a9f9e699718927977a3c75f80 100644
--- a/docs.it4i/general/obtaining-login-credentials/obtaining-login-credentials.md
+++ b/docs.it4i/general/obtaining-login-credentials/obtaining-login-credentials.md
@@ -203,7 +203,7 @@ We accept personal certificates issued by any widely respected certification aut
 
 Certificate generation process for academic purposes, utilizing the CESNET certification authority, is well-described here:
 
-* [How to generate a personal TCS certificate in Mozilla Firefox web browser.][k] (in Czech)
+* [How to generate a personal TCS certificate in Mozilla Firefox ESR web browser.][k] (in Czech)
 
 !!! note
     Certificate file can be installed into your email client. Web-based email interfaces cannot be used for secure communication, external application, such as Thunderbird or Outlook must be used. This way, your new credentials will be visible only in applications, that have access to your certificate.
@@ -217,7 +217,7 @@ A FAQ about certificates can be found here: [Certificates FAQ][7].
 Follow these steps **only** if you can not obtain your certificate in a standard way. In case you choose this procedure, attach a **scan of photo ID** (personal ID or passport or drivers license) when applying for login credentials.
 
 !!! warning
-    Please use Firefox (clone) for following steps. Other browsers, like Chrome, are not compatible.
+    Please use Firefox ESR (clone) for following steps. Other browsers, like Chrome, are not compatible.
 
 * Go to [Sectigo / Comodo Application for Secure Email Certificate][l].
 * Fill in the form, accept the Subscriber Agreement and submit it by the _Next_ button.