Hi, Please see [http://kb.mozillazine.org/Ui.scrollToClick this]. [http://kb.mozillazine.org/About:config_entries about:config Entries] If the bookmarks toolbar is visible, usually you can also click-once on a folder and immediately release the mouse button without keeping the button pressed, move the mouse pointer through all the entries in that and other folders without clicking again, and finally click on the desired entry. [https://support.mozilla.org/en-US/kb/Bookmarks%20Toolbar?s=bookmarks+toolbar&r=0&e=es&as=s Bookmarks Toolbar]

Thank You for your answer on the first two parts. Please reread my problem. Your third part answer is what I said it will not do. I can NOT release the mouse left button without the selection closing.

Does this happen in other programs, eg. notepad. If so it could be a hardware problem. If the problem is limited to Firefox please also check in a [https://support.mozilla.org/en-US/kb/Managing-profiles new profile]. You may also want to '''Disable''' the '''Plugins''' and any '''Extensions''' in '''Tools''' ('''Alt''' + '''T''') > '''Add-ons'''. If the new profile is okay, you can later [https://support.mozilla.org/en-US/kb/Recovering%20important%20data%20from%20an%20old%20profile?s=profile&r=1&e=sph&as=s copy the needed personal data] from the old profile and start using the new profile. You can then delete or troubleshoot the old profile. Firefox stores your personal data and settings in [http://kb.mozillazine.org/Profile_folder another location (profile folder)] separate from its [http://kb.mozillazine.org/Installation_directory folders/files]. A new profile would have the default Firefox settings in '''Tools''' ('''Alt''' + '''T''') > [https://support.mozilla.org/en-US/kb/Options%20window Options] and [http://kb.mozillazine.org/About:config about:config], and usually would also be empty of '''Extensions''' and themes ('''Appearance''') in '''Tools''' > '''Add-ons''', and their settings. Also, a new profile would have no previous stored website cache/cookies/data/preferences: '''Tools''' > [https://support.mozilla.org/en-US/kb/Clear%20Recent%20History '''Clear Recent History''']. [https://support.mozilla.org/en-US/kb/Profiles?s=profile&r=2&e=sph&as=s Profiles Howto] [http://kb.mozillazine.org/Profile_folder_-_Firefox Profile Folder & Files]

I notice it comes and goes. Last thing I remember is updates to add-ons. I'll get back, Thanks!