Mozillers, I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly. Now the much-used bookmarks have disappeared. A search site states promisingly: "To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..." But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do? Elsewhere I managed to find this file which apparently contains recent bookmarks: "C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4" But attempting to open it with Applications\firefox.exe (default) accomplishes nothing. FOOL-proof instructions would be wonderful. Thank you.