Please try the following

Uninstall firefox and install the one in this link

http://www.mozilla.org/en-US/firefox/fx/#desktop

Moderator changed the hyperlink to an official Mozilla source. Please do not refer users to non-official sources for Firefox downloads.

Unfortunately uninstalling and reinstalling from the link did not work. So error message. Thank you for trying.

I noticed the toolbar on Yahoo's site is about a month newer than the one on the Mozilla Add-ons page:

• AMO = 3.2.3.20140507025036
• Yahoo = 3.2.4.20140604103324

If you have the older one, maybe the newer one will be more compatible with Firefox 30?

https://us.toolbar.yahoo.com/

If it is a problem with a Yahoo toolbar you need to contact Yahoo. Have you checked that the toolbar is the latest version.

Quite possibly the toolbar needs updating after most Firefox updates. I do not really know anything about the toolbar but possibly you have "yahoo toolbar bookmarks" stored on the web and your standard Firefox bookmarks.

I do not know anything about Yahoo Toolbar but I did notice this article which could be read to indicate that Yahoo bookmarks are in a web account or somewhere else specific to the Yahoo toolbar.

• https://uk.help.yahoo.com/kb/toolbar/import-bookmarks-yahoo-toolbar-sln4736.html

Possibly it is the Yahoo upgrade mentioned in that article that is causing problems and losing Yahoo bookmarks.

Hopefully your Firefox bookmarks may be ok, but maybe you did not actully keep many.

I loaded an older version of the toolbar and did not see an icon for bookmarks. The gear icon to make changes to toolbar was inoperable. I went back to a newer version from Mozilla's add-on page and no go.

What I meant was the Add-ons page is not as up-to-date as Yahoo's site. Did you try the version from Yahoo's site?

Yes, I have tried that several times as well. Thank you though.