Keep search results. Camera RAW
When you full text searched all your files for content, like "incredibly useful procedures", you often want to check several of the files. Currently, once you opened one, I find no way to go back to the original search result, so I need to re-type the entire search string. As I do plenty of searches, this gets increasingly annoying.
It is a pity that you do not display the content of PNG and Nikon NEF files. For the NEF files you could at least display the embedded jpeg.