It sounds like the site requires a different Browser to access the site. If that is the case there's nothing Firefox can do about this site access issue. If so here did you also install the lastest Java 19.0.1 version to verify that it needed java software to run this is separate from javascript itself.

If so here did you also install the lastest Java 19.0.1 version to verify that it needed java software to run this is separate from javascript itself.

NPAPI Plugins has not been able to run in Firefox since 52.0, though Flash Player was supported for a while till early 2021.

Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work? https://support.mozilla.org/en-US/kb/npapi-plugins

See also:

• https://esign.com/
• https://www.google.com/search?sa=N&num=100&q=esign