hello, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here... [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]

You can check if you have the XML files of the default search engines including Google in the browser\searchplugins folder in the Firefox program folder. *(32 bit Windows) "C:\Program Files\Mozilla Firefox\" *(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\" If not then you need to reinstall Firefox. *http://kb.mozillazine.org/Unable_to_search_or_add_new_engines You can find the full version of the current Firefox 33.0 release in all languages and for all Operating Systems here: *https://www.mozilla.org/en-US/firefox/all.html Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure NOT to remove personal data if you would uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data. *http://kb.mozillazine.org/Profile_folder_-_Firefox