Push to Kindle button

Where do I find the button that I am to push to will send my Firefox web page to my Kindle. I don’t see any button.

Hi there, if you right click on the toolbar and then click ‘Customise…’ you’ll be able to add the button (drag the icon to the toolbar). This should get added automatically, but many people have problems with it. We’re going to release an update soon. Sorry about the confusion.