Omnibox: Add DDG, Startpage, Disconnect, Youtube, Twitter; remove Amazon, eBay, bing

eBay and Amazon don't treat Tor users very well. Accounts often get locked and
payments reversed.

Also:
Bug 16322: Update DuckDuckGo search engine

We are replacing the clearnet URL with an onion service one (thanks to a
patch by a cypherpunk) and are removing the duplicated DDG search
engine. Duplicating DDG happend due to bug 1061736 where Mozilla
included DDG itself into Firefox. Interestingly, this caused breaking
the DDG search if JavaScript is disabled as the Mozilla engine, which
gets loaded earlier, does not use the html version of the search page.
Moreover, the Mozilla engine tracked where the users were searching from
by adding a respective parameter to the search query. We got rid of that
feature as well.

Also:
This fixes bug 20809: the DuckDuckGo team has changed its server-side
code in a way that lets users with JavaScript enabled use the default
landing page while those without JavaScript available get redirected
directly to the non-JS page. We adapt the search engine URLs
accordingly.

Also fixes bug 29798 by making sure we only specify the Google search
engine we actually ship an .xml file for.

Also regression tests.

browser/components/search/extensions/wikipedia/_locales/pa/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (pa)"
-  },
-  "extensionDescription": {
-    "message": "ਵਿਕਿਪੀਡਿਆ, ਮੁਫ਼ਤ/ਮੁਕਤ ਸ਼ਬਦਕੋਸ਼"
-  },
-  "searchUrl": {
-    "message": "https://pa.wikipedia.org/wiki/ਖ਼ਾਸ:ਖੋਜੋ"
-  },
-  "searchForm": {
-    "message": "https://pa.wikipedia.org/wiki/ਖ਼ਾਸ:ਖੋਜੋ?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://pa.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/pl/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (pl)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedia, wolna encyklopedia"
-  },
-  "searchUrl": {
-    "message": "https://pl.wikipedia.org/wiki/Specjalna:Szukaj"
-  },
-  "searchForm": {
-    "message": "https://pl.wikipedia.org/wiki/Specjalna:Szukaj?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://pl.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/pt/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (pt)"
-  },
-  "extensionDescription": {
-    "message": "Wikipédia, a enciclopédia livre"
-  },
-  "searchUrl": {
-    "message": "https://pt.wikipedia.org/wiki/Especial:Pesquisar"
-  },
-  "searchForm": {
-    "message": "https://pt.wikipedia.org/wiki/Especial:Pesquisar?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://pt.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/rm/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (rm)"
-  },
-  "extensionDescription": {
-    "message": "Vichipedia, l'enciclopedia libra"
-  },
-  "searchUrl": {
-    "message": "https://rm.wikipedia.org/wiki/Spezial:Search"
-  },
-  "searchForm": {
-    "message": "https://rm.wikipedia.org/wiki/Spezial:Search?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://rm.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/ro/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (ro)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedia, enciclopedia liberă"
-  },
-  "searchUrl": {
-    "message": "https://ro.wikipedia.org/wiki/Special:Căutare"
-  },
-  "searchForm": {
-    "message": "https://ro.wikipedia.org/wiki/Special:Căutare?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://ro.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/ru/messages.json

-{
-  "extensionName": {
-    "message": "Википедия (ru)"
-  },
-  "extensionDescription": {
-    "message": "Википедия, свободная энциклопедия"
-  },
-  "searchUrl": {
-    "message": "https://ru.wikipedia.org/wiki/Служебная:Поиск"
-  },
-  "searchForm": {
-    "message": "https://ru.wikipedia.org/wiki/Служебная:Поиск?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://ru.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/si/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (si)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedia, the free encyclopedia"
-  },
-  "searchUrl": {
-    "message": "https://si.wikipedia.org/wiki/විශේෂ:ගවේෂණය"
-  },
-  "searchForm": {
-    "message": "https://si.wikipedia.org/wiki/විශේෂ:ගවේෂණය?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://si.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/sk/messages.json

-{
-  "extensionName": {
-    "message": "Wikipédia (sk)"
-  },
-  "extensionDescription": {
-    "message": "Wikipédia, slobodná a otvorená encyklopédia"
-  },
-  "searchUrl": {
-    "message": "https://sk.wikipedia.org/wiki/Špeciálne:Hľadanie"
-  },
-  "searchForm": {
-    "message": "https://sk.wikipedia.org/wiki/Špeciálne:Hľadanie?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://sk.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/sl/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedija (sl)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedija, prosta enciklopedija"
-  },
-  "searchUrl": {
-    "message": "https://sl.wikipedia.org/wiki/Posebno:Iskanje"
-  },
-  "searchForm": {
-    "message": "https://sl.wikipedia.org/wiki/Posebno:Iskanje?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://sl.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/sq/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (sq)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedia, enciklopedia e lirë"
-  },
-  "searchUrl": {
-    "message": "https://sq.wikipedia.org/wiki/Speciale:Kërkim"
-  },
-  "searchForm": {
-    "message": "https://sq.wikipedia.org/wiki/Speciale:Kërkim?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://sq.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/sr/messages.json

-{
-  "extensionName": {
-    "message": "Википедија (sr)"
-  },
-  "extensionDescription": {
-    "message": "Претрага Википедије на српском језику"
-  },
-  "searchUrl": {
-    "message": "https://sr.wikipedia.org/wiki/Посебно:Претражи"
-  },
-  "searchForm": {
-    "message": "https://sr.wikipedia.org/wiki/Посебно:Претражи?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://sr.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/sv-SE/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (sv)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedia, den fria encyklopedin"
-  },
-  "searchUrl": {
-    "message": "https://sv.wikipedia.org/wiki/Special:Sök"
-  },
-  "searchForm": {
-    "message": "https://sv.wikipedia.org/wiki/Special:Sök?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://sv.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/ta/messages.json

-{
-  "extensionName": {
-    "message": "விக்கிப்பீடியா (ta)"
-  },
-  "extensionDescription": {
-    "message": "விக்கிப்பீடியா (ta)"
-  },
-  "searchUrl": {
-    "message": "https://ta.wikipedia.org/wiki/சிறப்பு:Search"
-  },
-  "searchForm": {
-    "message": "https://ta.wikipedia.org/wiki/சிறப்பு:Search?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://ta.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/te/messages.json

-{
-  "extensionName": {
-    "message": "వికీపీడియా (te)"
-  },
-  "extensionDescription": {
-    "message": "వికీపీడియా (te)"
-  },
-  "searchUrl": {
-    "message": "https://te.wikipedia.org/wiki/ప్రత్యేక:అన్వేషణ"
-  },
-  "searchForm": {
-    "message": "https://te.wikipedia.org/wiki/ప్రత్యేక:అన్వేషణ?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://te.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/th/messages.json

-{
-  "extensionName": {
-    "message": "วิกิพีเดีย"
-  },
-  "extensionDescription": {
-    "message": "วิกิพีเดีย สารานุกรมเสรี"
-  },
-  "searchUrl": {
-    "message": "https://th.wikipedia.org/wiki/พิเศษ:ค้นหา"
-  },
-  "searchForm": {
-    "message": "https://th.wikipedia.org/wiki/พิเศษ:ค้นหา?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://th.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/tl/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (tl)"
-  },
-  "extensionDescription": {
-    "message": "Wikipedia, ang malayang ensiklopedya"
-  },
-  "searchUrl": {
-    "message": "https://tl.wikipedia.org/wiki/Natatangi:Maghanap"
-  },
-  "searchForm": {
-    "message": "https://tl.wikipedia.org/wiki/Natatangi:Maghanap?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://tl.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/tr/messages.json

-{
-  "extensionName": {
-    "message": "Wikipedia (tr)"
-  },
-  "extensionDescription": {
-    "message": "Vikipedi, özgür ansiklopedi"
-  },
-  "searchUrl": {
-    "message": "https://tr.wikipedia.org/wiki/Özel:Ara"
-  },
-  "searchForm": {
-    "message": "https://tr.wikipedia.org/wiki/Özel:Ara?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://tr.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/uk/messages.json

-{
-  "extensionName": {
-    "message": "Вікіпедія (uk)"
-  },
-  "extensionDescription": {
-    "message": "Вікіпедія, вільна енциклопедія"
-  },
-  "searchUrl": {
-    "message": "https://uk.wikipedia.org/wiki/Спеціальна:Пошук"
-  },
-  "searchForm": {
-    "message": "https://uk.wikipedia.org/wiki/Спеціальна:Пошук?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://uk.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/ur/messages.json

-{
-  "extensionName": {
-    "message": "ویکیپیڈیا (ur)"
-  },
-  "extensionDescription": {
-    "message": "ویکیپیڈیا آزاد دائرۃ المعارف"
-  },
-  "searchUrl": {
-    "message": "https://ur.wikipedia.org/wiki/خاص:تلاش"
-  },
-  "searchForm": {
-    "message": "https://ur.wikipedia.org/wiki/خاص:تلاش?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://ur.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file

browser/components/search/extensions/wikipedia/_locales/uz/messages.json

-{
-  "extensionName": {
-    "message": "Vikipediya (uz)"
-  },
-  "extensionDescription": {
-    "message": "Vikipediya, ochiq ensiklopediya"
-  },
-  "searchUrl": {
-    "message": "https://uz.wikipedia.org/wiki/Maxsus:Search"
-  },
-  "searchForm": {
-    "message": "https://uz.wikipedia.org/wiki/Maxsus:Search?search={searchTerms}&sourceid=Mozilla-search"
-  },
-  "suggestUrl": {
-    "message": "https://uz.wikipedia.org/w/api.php?action=opensearch&search={searchTerms}"
-  },
-  "searchUrlGetParams": {
-    "message": "search={searchTerms}&sourceid=Mozilla-search"
-  }
-}
\ No newline at end of file