While I'm here, another app to add to the list- PDFLite. While it opens and works fine, WindowBlinds doesn't like its tabs and obscures where they should be.
Actually, you can add Word 2016 (and possibly the rest of the modern Microsoft Office apps too?) too for not bringing dialogue windows to the front unless you alt-tab off and back again, but then that might just only be for me.
P.S. Thanks to whoever fixed the forums in Firefox / whichever add-on was breaking stuff.