Hi, if I knew what a IMSC was.... So you have the Menu Bar turned on and I would guess you are talking about the Bookmarks Toolbar that you are having a issue with. <blockquote> I went to customize by the way and no assistance whatsoever </blockquote>I have no idea what you are leading to with this. Please expand on the what you would like to customize. So you have tried drag and drop to the Bookmarks Toolbar and that does not work ? Have you tried dragging and dropping a URL into Bookmarks Title heading which opens bookmarks then dropping it into the Bookmarks Toolbar Folder ? What is it that you are trying to customize ? Please save a copy of your Profile : *https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data and always : *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer Please try once you have saved and backed up to Copy/Paste about:support into the Address Bar then go way down to Places Data Base and Click Verify. Please restart Firefox and see if that works. If not please try : Refresh feature (called "Reset" in older Firefox versions) can fix many issues by restoring Firefox to its factory default state while saving your bookmarks, history, passwords, cookies, and other essential information. '''''Note:''' When you use this feature, you will lose any extensions, toolbar customizations, and some preferences.'' See the [[Refresh Firefox - reset add-ons and settings]] article for more information. To Refresh Firefox: # Open the Troubleshooting Information page using one of these methods: #*Click the menu button [[Image:New Fx Menu]], click help [[Image:Help-29]] and select ''Troubleshooting Information''. A new tab containing your troubleshooting information should open. #*If you're unable to access the Help menu, type '''about:support''' in your address bar to bring up the Troubleshooting Information page. #At the top right corner of the page, you should see a button that says "Refresh Firefox" ("Reset Firefox" in older Firefox versions). Click on it. #Firefox will close. After the refresh process is completed, Firefox will show a window with the information that is imported. #Click Finish and Firefox will reopen. Did this fix the problem? Please report back to us! For Customize : https://www.howtogeek.com/333110/how-to-customize-firefox-quantum-and-remove-the-white-space-around-the-title-bar/ and *https://www.howtogeek.com/334716/how-to-customize-firefoxs-user-interface-with-userchrome.css/ *http://techdows.com/2017/09/classic-theme-restorer-userchrome-css-modify-firefox-57-photon-ui.html *https://github.com/Aris-t2/CustomCSSforFx/issues/1 *https://www.accessfirefox.org/Theme-Font-Size-Changer.php *https://www.userchrome.org/ *https://www.accessfirefox.org/Firefox_Accessibility_Themes.php *https://www.userchrome.org/what-is-userchrome-css.html *http://kb.mozillazine.org/UserChrome.css *https://github.com/axydavid/FirefoxUI/blob/master/README.md *https://github.com/wilfredwee/photon-australis *https://www.reddit.com/r/FirefoxCSS/ Note not all code in one place. Post a new question on Customize if need help. Please let us know if this solved your issue or if need further assistance.

Make sure toolbars like the "Bookmarks Toolbar" are visible. Open the Customize window and set what toolbars (Show/Hide Toolbars) and toolbar items to display. *Right-click empty toolbar area -> Customize *"3-bar" menu button -> Customize *View -> Toolbars<br>*you can tap the Alt key or press the F10 key to show the hidden Menu Bar temporarily *check that "Bookmarks Toolbar Items" is on the Bookmarks Toolbar *if "Bookmarks Toolbar Items" is not on the Bookmarks Toolbar then drag it back from the Customize palette to the Customize window to the Bookmarks Toolbar *if missing items are in the Customize palette then drag them back from the Customize window to the toolbar *if you do not see an item on a toolbar and in the Customize palette then click the <u>Restore Defaults</u> button in the Customize palette window to restore the default toolbar set. *https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars *https://support.mozilla.org/en-US/kb/navigation-buttons-missing