Please
do not post the same message multiple times in different threads
, and do not just tell people to fix an issue when the issue is most likely not in Vaadin but in your code and images.
As others have written in reply to your previous messages, the problem is probably not in Vaadin nor in the ImageScaler add-on, but in that the types of images you are trying to use are not suitable for use on the web. Many people are successfully using Vaadin and ImageScaler to display images, and I am quite certain nobody would if it would not work for them in all the standard browsers.
Are you able to load them at all (directly, not via a web application) in those browsers? Even if the answer is yes, that does not necessarily mean they would be suitable for use on the web, but it is a good first test. Vaadin or ImageScaler do not magically convert the images from BMP to something that might work better on the web, they just let the browser display them. GIF, JPEG and PNG images should work on all browsers, for other formats there are no guarantees - and this has nothing to do with Vaadin.
Others have also already told you to convert them to a suitable image type, with pointers to conversion tools.