.. ================================================== .. FOR YOUR INFORMATION .. -------------------------------------------------- .. -*- coding: utf-8 -*- with BOM. .. include:: ../Includes.txt .. _known-problems: Known Problems ============== Currently the srcset attribute is not supported by all browser. A list can be found here http://caniuse.com/#feat=srcset As a workaround, we use the srcset polyfill written by Boris Smus https://github.com/borismus/srcset-polyfill/ We tested the extension with the latest TYPO3 7.5 version. Everything works fine but the lazyloading feature of the introduction package is not working. The "lazyloading" class in the HTML is not removed. That's why images are rendered with an opacity of 0.3. So if you are using the lazyloading feature, you maybe get problems. As a temporary workaround you could fix it with an CSS notation img.lazyload {opacity: 1;} We try to fix the issue with the TYPO3 7 LTS version. Tipps ============== If you have the problem, that in Firefox the proportion of the images are not correct, try to set the images width to 100% via CSS. For example .csc-default img{width:100%;}