After update to version 20.0 all search engines are lost and it is impossible to "Restore defaults" in "Search engines list"
This problem is only when I run Firefox logged in in domain. When I am logged as a local user, everything is OK. I tried to uninstall FF, delete all folders with Mozilla name in local and server profile, deleted FF with CCleaner together with cleaning wrong registers,nothing helps.
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After 1 week suddenly everything corrected without any action from my side. Strange...