That is something you need to ask Speco support about what supported browser to use.

Firefox discontinued support for all binary plugins other than Flash more than seven years ago (Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work?). So no way will it work in Firefox.

Do you still have Internet Explorer 11 on your computer? It might support an ActiveX version of the camera software, or Edge might have a backwards compatibility mode.

So this is a IP camera? as perhaps one of these extensions may work?

https://addons.mozilla.org/firefox/addon/myipcam-for-ip-cameras/ https://addons.mozilla.org/firefox/addon/simple-ip-camera-viewer/