Firefox 53.0.2 (32 bit) + "Fire IE DLL not loaded" on Windows7 Professinal SP1 (32bit)

[Benno99]

Pop-up window occurs with error-message "Fire IE dll not loaded".
Fire IE dll 1.4.6.2

What is to do, to run Fire IE in Firefox 53.0.2 (32 bit) on Windows7 Professional SP1 (32bit)?

[novaeye]

#192 (comment)