Can you specify where are you trying to search?

• searching via the location bar (pref: keyword.URL)
• search bar on the Navigation Toolbar
• search bar on the about:home page
• other search bar (e.g. added by extension)

See also:

• http://kb.mozillazine.org/Unable_to_search_or_add_new_engines

If there is a problem with searching via the default about:home page then try to reset the search engine used on the about:home page.

Reset the browser.startup.homepage_override.mstone pref via the right-click context menu to the default on the about:config page and close and restart Firefox to restore the about:home page to its default.

• http://kb.mozillazine.org/about:config

1. Open the about:config page via the location bar
2. Type in the Filter bar: mstone
3. Right-click the browser.startup.homepage_override.mstone line and select: Reset
4. Close and restart Firefox

If this didn't help then delete the delete the chromeappsstore.sqlite file in the Firefox Profile Folder and repeat the above.

I've lost the search box from my toolbar.When I go to Google to get it back they tell me to click an arrow I don't have.

If the menu bar is hidden then press the F10 key or hold down the Alt key to make the menu bar appear.

Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible:

• "View > Toolbars"

Open the Customize window to set which toolbar items to display:

• View > Toolbars > Customize
• Firefox > Options > Toolbar Layout

• If missing items are in the toolbar palette then drag them back from the Customize window on the toolbar
• If you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar set up

See also:

• http://kb.mozillazine.org/Toolbar_customization
• https://support.mozilla.org/kb/Back+and+forward+or+other+toolbar+items+are+missing

You can check for problems with the localstore.rdf file if this didn't help.

• http://kb.mozillazine.org/Corrupt_localstore.rdf

Solved!