hello Rajesh_M, you can reset the new tab page like this: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named browser.newtab.url - right-click and reset that entry to the default value.

The thumbnails on the new tab page are missing - how to get them back

cross posted with Philipp. Please ignore.

Which version of Firefox are you using?

You can use the SearchReset extension to reset some preferences to the default values.

• https://addons.mozilla.org/firefox/addon/searchreset/

Note that the SearchReset extension only runs once and then uninstalls automatically, so it won't show on the "Firefox > Add-ons" page (about:addons).

If you do not keep changes after a restart or otherwise have problems with preferences, see:

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

Hi AbinashBishoyi, for future reference, you can check the version in the right column next to the original post under Question Details. (Unless the user posts with a different browser, in which case, you do have to ask.)

Thank you Philipp and others.Problem solved