I would expect that is from your "Yahoo Toolbars" extension though the way "YonToo" extension gets installed doesn't look very good from comments about riding along with the installation of another extension. Getting rid of the "Yahoo Toolbar" is not clean like the extensions you will find at addons. ''Yahoo Toolbar messes up Location Bar Search'' '''Remove the Yahoo Toolbar''' # "Ctrl+Shift+A" (Add-ons Manager) # Select Puzzle piece on left-side for Extensions List # Find "Yahoo Toolbar" and click on "Uninstall" button, and restart Firefox. ''(if you really need to keep the Yahoo toolbar, you can hide the toolbar instead with customize, and still change all the search defaults as below)'' '''Then to fix the default search engine''' used at the Location Bar, change the value of '''keyword.URL''' in '''about:config''' to one of the values shown in [http://kb.mozillazine.org/Location_Bar_search#Location_Bar_search_.28external_-_search_engine.29 Location Bar search] at MozillaZine. * Google Search (Google search results page)<br>'''http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=''' # type in '''about:config''' into the location bar (in a new tab) # if the warning message nonsense comes up ''uncheck'' the box '''before''' dismissing the dialog message # '''filter on keyword''' # right-click on '''keyword.URL''' and choose "modify" then paste in the Google search engine string of your choice. # '''filter on defaulturl''' # right-click on '''browser.search.defaulturl''' ''(if it exists)''and again choose "modify" then paste in the Google search engine string of your choice. # '''filter on ytff''' # right-click on '''yahoo.ytff.search.popup_src''' ''(if it exists)'' and again choose "modify" then paste in the Google search engine string of your choice, if adventurous might see if "reset" would remove and see if gone in next session (well not for those keeping the extension). --used in https://support.mozilla.com/questions/850287 '''Avoiding the problems:''' Many software installations contain additional baggage known as crapware. The Yahoo Toolbar is packaged with Java [http://imageshack.us/photo/my-images/266/javainstall.png/ picture] More information on ask.com, Yahoo Toolbars which involve extensions, not just changes to the home page. * http://kb.mozillazine.org/Problematic_extensions * Uninstalling toolbars - MozillaZine Knowledge Base<br>http://kb.mozillazine.org/Uninstalling_toolbars '''More information on configuration variables''' available in [http://kb.mozillazine.org/About:config_entries about:config entries] and for users not familiar with the process there is [http://kb.mozillazine.org/About:config about:config] (How to change). ---- A lot of people are questioning the installation of YonToo as crapware with another install. * https://addons.mozilla.org/en-US/firefox/addon/easy-youtube-video-downl-10137/reviews/user:4842303

Hi, I get this and other non-responsive script messages, especially on the 'Group your tabs' page, which precludes (or delays) me from selecting my next tab group as a new box often appears. Some start chrome: (I dont have Chrome installed) or resourse: wrt another reply, I don't have the Yahoo toolbar Another (linked?) problem is that the tab groups get jumbled up, and I believe some tabs get swapped to different groups. What's going wrong with firefox? Is a solution in sight?