Actually I just stumbled across something. All morning I was able to open images and look at them. These were images that opened in their own window like always when you are transcribing or indexing. Then suddenly they were not opening anymore. I clicked on various ones, no response.
After logging out and back in, I was able to click on thumbnails and have them open in the browser window, but not in the separate window for transcribing or indexing. That problem is still not solved (am I clicking on something that removes that function?????) but it caused me to try a solution. I went to Firefox, file, open new private window. A window opened with no content. Then I copied the address of the image that was open in the browser, pasted it in, and sure enough it opened in there. Then I tried the same process with a second image and sure enough, it opened in a second private window while the first image did not close. So this might work for what I need and maybe someone could describe it for others as well.