Open Firefox and go to the URL: https://myguide.org/
Hover over "Download"
Select "Firefox Player"
You will be redirected to the Firefox Add-ons where you have to click "+ Add to Firefox"
MyGuide Player has been added to Firefox. Click "OK"
Refresh the page, enter any URL in the address bar such as https://www.google.com/
And spot the widget icon in the lower right of your web page