Ctrl+Shift+D does not bring up bookmark dialog [no response]. Only way to "save all tabs" now is to press alt+B, then move mouse pointer to dropdown menu and select the "save all tabs" menu item with the mouse poiter [only]. This kind of defeats the "keyboard shortcut" approach to ease of use. Previous behavior was by pressing Ctrl+Shift+D would bring up a save bookmarks dialog, and I'm done. I use a lot of "save all tabs". This is only become an issue since apparently installing Firefox v115.12.0esr version 2 days ago, which I didn't hardly remember happening. Although I am running Win8.1, but as stated this was not issue before the newer version Firefox installed. This does not appear to be a Win8.1 incompatibility issue. I have intended to upgrade to Win10, but have other more pressing events recently [accidents, hospitals, etc, etc,etc.] My keyboard tests OK. The Ctrl+Shift+D combination registers as an OK keyboard combination. [?] I've run FF with extensions disabled - same results. [?] Thanks.