Yes, the shortcut to open the Download history panel in the Library window varies by platform for some reason: * Linux: Ctrl+Shift+y * Windows: Ctrl+j * Mac: Command+j Is your goal to map Ctrl+Shift+y to Downloads in Firefox for Windows? I recently saw a thread on Reddit about using an Autoconfig file (two files are actually involved) to modify Ctrl+Shift+b. You might take a look at this thread and perhaps there is a similar approach to adding Ctrl+Shift+y that would work and wouldn't need to get redone after every update. I suppose you could reply to the author and see if they'll help. * [[Customizing Firefox Using AutoConfig]] * https://www.reddit.com/r/firefox/comments/kilmm2/restore_ctrlshiftb_library_by_setting_configjs/ (I have not tested this myself)