This can be a problem with the file places.sqlite that stores the bookmarks and the history.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

• Don't make any changes on the Safe mode start window.

See:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Looks like it was a problem with the multi-column add on for bookmarks. Odd that it was working fine one day but not the next. Removed that add on and now the bookmarks all show up in a single column. If you know of any other add ons that put bookmarks in multi-column I'd love to hear about it. One of my biggest complaints with IE and FF is this single column for bookmarks. Thanks again for the help.

Sorry, that is the only extension that I have seen for recent versions of Firefox, which displays the bookmarks menu bar drop-down in multiple columns.

Overall, that one is the third attempt by different people to create an extension to do that, over the last 5 or 6 years, and it is the most complete - but it is still unfinished, IMO. It probably won't be updated for the new Firefox 4.0 and will "die" as the other two did.

Thanks anyway for the input. Appreciated.

You're welcome. I wish I would have been able recommend an extension that works, though - I have tried every every extension like that that I have ever found. Because I don't like that long scrolling list either, I don't even usually use the Bookmarks menu bar drop-down, I access my bookmarks from the Sidebar which has a "proper" scroll bar for the long list, and which I find easier to use.

Good point. I'll probably start doing that myself.