Troubleshooting the Image Viewer Home / Troubleshooting, Viewing / Troubleshooting the Image Viewer When double-clicking the image thumbnail does nothing: Add www.sharedshelfcommons.org as a trusted site and disable popup blockers. If you canot disable the popup blockers in one browser, try a different browser. When the viewer window opens but the image does not load: Try clearing your browser cache. Check that you have Flash installed and updated. In Firefox you may need to disable flashblock.