/usr/share/xul-ext/searchload-options/locale/en-US/search-options.dtd is in xul-ext-searchload-options 0.8.0-2.
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 13 14 15 16 17 | <!ENTITY title.prefwindow "Search Options">
<!ENTITY label.searchbar_group "Searchbar">
<!ENTITY label.clear_searchbar "Clear the searchbar:">
<!ENTITY checkbox.on_submission "On search submission">
<!ENTITY checkbox.on_searchbar_blur "On searchbar blur">
<!ENTITY label.delay "Delay:">
<!ENTITY label.delay_units "seconds">
<!ENTITY label.reset_searchengine "Reset the search engine to:">
<!ENTITY label.tabs_group "Tabs">
<!ENTITY label.load_search_in "Load search in:">
<!ENTITY label.active_tab "Active tab">
<!ENTITY label.new_foreground_tab "New foreground tab">
<!ENTITY label.new_background_tab "New background tab">
<!ENTITY label.tab_exceptions "Exceptions for new tabs:">
<!ENTITY checkbox.detect_blank_tab "Blank tab">
<!ENTITY checkbox.detect_home_tab "Home page tab">
<!ENTITY checkbox.detect_new_tab_page "New Tab page">
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