/usr/lib/firefox/distribution/searchplugins/locale/cs/jyxo-cz.xml is in firefox-locale-cs 11.0+build1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | <SearchPlugin xmlns="http://www.mozilla.org/2006/browser/search/">
<ShortName>Jyxo.cz</ShortName>
<Description>Hledání pomocí Jyxo.cz</Description>
<InputEncoding>UTF-8</InputEncoding>
<Image width="16" height="16">data:image/x-icon;base64,R0lGODlhEAAQAJEAAPz+/ATyBATKBAQCBCH5BAAAAAAALAAAAAAQABAAAAJBhI82mw1zIAg0iCvCoM9Ui2mc9GGbxniV+SFYtsSXy2ovfZ3D/exCvMIgPr5MJXKyXVpIyovpWYCWx4TEgUhhDQUAOw==</Image>
<Url type="text/html" method="GET" template="http://jyxo.cz/s">
<Param name="q" value="{searchTerms}"/>
<Param name="d" value="cz"/>
<Param name="i" value="firefox"/>
</Url>
<SearchForm>http://jyxo.cz/</SearchForm>
</SearchPlugin>
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