[Bug-gnuzilla] search-engines can not be edited

[ng0]

I consider this a bug in icecat, not a feature:

When I use firefox and add "searx" from https://about.me/about ,
I am able to later edit its url in about:preferences#search and
change the properties to set the url to an .onion address.

I see no reason why I this ability should be removed in icecat,
anyone got an explanation why this functionality is removed?

And keyword.URL in about:config is not what I mean.

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