Maybe add scroll bars.

• [/questions/1000428] Scroll Bar on Bookmarks

Add code to the userChrome.css file below the default @namespace line.

• http://kb.mozillazine.org/userChrome.css

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

/* BOOKMARKS MENU - scroll bar */
#bookmarksMenuPopup scrollbox,
#bookmarks-menu-button scrollbox,
#PlacesChevronPopup scrollbox,
#PlacesToolbarItems scrollbox {overflow-y:auto!important}

#bookmarksMenuPopup autorepeatbutton,
#bookmarks-menu-button autorepeatbutton,
#PlacesChevronPopup autorepeatbutton,
#PlacesToolbarItems autorepeatbutton {display:none!important}

/* LIST-ALL-TABS - scroll bar */
#alltabs-popup scrollbox {overflow-y:auto!important}
#alltabs-popup .autorepeatbutton-up,
#alltabs-popup .autorepeatbutton-down {display:none!important}

/* LIST-ALL-TABS - always visible */
#tabbrowser-tabs ~ #alltabs-button {visibility:visible!important}

• create the chrome folder (lowercase) in the <xxxxxxxx>.default profile folder if this folder doesn't exist
• use a plain text editor like Notepad to create a (new) userChrome.css file in the chrome folder (file name is case sensitive)
• paste the code in the userChrome.css file in the editor window
• make sure that the userChrome.css file starts with the default @namespace line
• make sure that you select "All files" and not "Text files" when you save the file via "Save file as" in the text editor as userChrome.css.
  otherwise Windows may add a hidden .txt file extension and you end up with a not working userChrome.css.txt file

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

• Help -> Troubleshooting Information -> Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

thank you cor-el for your reply. i did NOT have a userChrome.css file so i created it. still have the same problem as mentioned above. i think i now know what is happening. when the Bookmarks list is down and you place the cursor on a FOLDER and try to scroll, the 'scroll focus' (?) is directed to/in that expanded 'Folder List' that the cursor is on, NOT on the main Bookmarks list. does this reasoning make sense? i don't know if this is fixable, the 'scroll focus' needs to be directed in the list it is currently 'in'. thanks

addendum maybe if the 'auto-expand' is turned off so you have to actually 'click' on a folder to display it's list the 'scroll focus' would stay in the main list - just a thought. thanks

With the above posted code in the CSS file named userChrome.css you should see a vertical scroll bar that allows to scroll this list very easily by dragging the scroll thump up and down. If the code isn't working as it should then make sure that the file is in the correct location and has the correct name (i.e. shows as a CSS file named userChrome.css and not as a text file named userChrome.css.txt) and is a plain text file and not a special formatted file. You can drag the file in a Firefox window to see the file name and its content.