That's strange. Downloads are displayed in the same Library window as Bookmarks ("Show All Bookmarks" or Command+Shift+b) and History ("Show All History"). Is the window oversized with either of those methods? Sometimes the file that stores window sizes and positions becomes corrupted with nonsensical values. You can rename the file and customize to restore certain defaults. Open your current Firefox settings (AKA Firefox profile) folder using either * "3-bar" menu button > "?" button > Troubleshooting Information * (menu bar) Help > Troubleshooting Information * type or paste about:support in the address bar and press Enter/Return In the first table on the page, click the "Show in Finder" button. This should launch a new window listing various files and folders. (If it shows only a folder with a partially random name, double-click into that folder.) Leaving that window open, switch back to Firefox and Quit, either: * "3-bar" menu button > "power" button * (menu bar) Firefox > Quit Pause while Firefox finishes its cleanup, then rename '''xulstore.json''' to something like xulstore.old. If you see a file named localstore.rdf, rename that one to localstore.old. Start Firefox back up again. Does the Library window display normally again? Resetting the display file may re-hide the Bookmarks Toolbar. To turn that back on, you can use one of these methods to show the toolbar list: * right-click (on Mac Ctrl+click) a blank spot on the tab bar (or the "+" button) * (menu bar) View > Toolbars<br><em>On Windows, tap the Alt key to activate the menu bar temporarily.</em> * in Customize mode > Show/Hide Toolbars (see: [[Customize Firefox controls, buttons and toolbars]]) To turn on the Bookmarks Toolbar, click it on the list.