Hello. Sorry to disturb you. My name is Dominic Simpson. I am contacting here because I am redesigning my website, and in the process have found that there are problems with Firefox. Specifically, I am upgrading the Photography section of my website, which currently looks like this: http://www.dominicsimpson.co.uk/photography.html My upgrading includes employing Bootstrap frameworks to make the images scale gracefully, while within a responsive container that already exists. In addition, when the user mouses over an image, the image transforms nicely with descriptive text over a blue colour, rather than what is there at the moment, where the user has to click on the image to have a larger one come up in a separate window with a description watermarked in it. I am finding that Firefox is not displaying the images in this new work-in-progress. This is despite the fact that: 1. I have upgraded to the latest version of Firefox, and have deleted extensions, cookies and cache, as well as checking settings in the Configuration page of Firefox 2. Other web browsers, such as Google Chrome, Microsoft Edge, and Opera, have had no problems displaying the images You can see the new code here on GitHub, together with the CSS: https://github.com/DominicSimpson/photography The photography section of the CSS is on line 1951 onwards (it’s a huge file). Is there some kind of code that I can add to the CSS that would make the images appear in Firefox? Look forward to hearing from you, and thanks for reading. Kind regards Dominic ''[Personal information removed by moderator. Please read [[Mozilla Support rules and guidelines]], thanks.]''