Firefox 50.1.0 does not interpret a download link in this style right: <a href="/images/myw3schoolsimage.jpg" download> Reference: „The value of the attribute will be the name of the downloaded file. There are no restrictions on allowed values, and the browser will automatically detect the correct file extension and add it to the file (.img, .pdf, .txt, .html, etc.).“ http://www.w3schools.com/TAgs/att_a_download.asp This works if I try to open a file (directly in the download window - see attached image). But if I click "Save As" it fails. Link to try (as long as the web agency has not changed the behaviour to additionally support Firefox [Edge, Chrome, IE: working; Safari: not tested]) : http://prolicht.at/de/produkte/produktfamilien/bioniq/bioniq-round-semi-adjustable-chrome-einbau-strahler/?&order_number=220-0133#/Configurator/Size/%7B%22color%22:%7B%7D,%22options%22:%7B%22sizeFilter%22:%7B%22diameter%22:%7B%22d%22:139,%22h%22:137%7D%7D,%22lightMediumFilter%22:%7B%22Illuminant%22:%22LED%22,%22ColorTemperature%22:%223000K%22,%22IlluminantDescription%22:%22%2024W%20%7C%203030%20LUMEN%22%7D,%22dimmerFilter%22:%22depending%22%7D,%22techoptions%22:%7B%22reflector%22:%7B%22kz%22:%2240%22,%22wert%22:%2240.00%22,%22r%22:%22r1%22%7D%7D,%22accessories%22:%5B%5D,%22configurationCompleted%22:true,%22accessoriesCompleted%22:true%7D/ Yours sincerely, Andreas Hörl PROLICHT GmbH - Austria Architectural Lighting