Try restart FIrefox, test again.Case the problem continue: Try do this in Safe Mode: *[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in safe mode] Try create a new profile: *[https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles Create a new profile] Also: *[https://support.mozilla.org/en-US/kb/remove-recent-browsing-search-and-download-history Clear recent history] In the last case try reset Firefox: *[https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems Reset Firefox]

Problems with bookmarks and history not working properly can be caused by a corrupted places.sqlite database file. You can check for problems with the places.sqlite database file in the Firefox profile folder. *http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox *https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

Thank You. Deleting the places.sqlite file solved the problem.