"...look for a file name you know to be in there,..."

durn trouble is, some of them are renamed to a temp/cache name which has no relation to the original, which means you need to examine date/time/size - etc., to locate what you want. Some browsers do it themselves, and some sites have code on their pages that specify a certain naming system for files they don't WANT to be easily captured. Some even manage to assure that it will be deleted when you close your browser.

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So, glad something worked, Susan. Did you get the add-on, or just find the file?