so a weird search enginge kept coming up as my new tab, instead of the most visited thumbnails which i like. so i go into the about:config to browser.newtab.url and reset to default (about:newtab) this works fine whilst i remain on firefox but once i close it and come back it know just shows a blank window on my new tab, so everytime i use firefox i have to go into the about:config and reset the newtab url. is there anyway i can stop this from happening and keeping it set as the default.