If the icon is not present in your browser, it means the application installed is not compatible with your browser or you have an obsolete version of the downloader. However, try to update all your browsers to their latest versions and then install the application from the official website. Make sure that when the installation is in progress, the browsers are closed because the toolbar/button will be added as an extension. If the browsers are opened while the operation is on going, the add-on will not be installed properly.
