Masayuki Nakano d70e55af73 Bug 1449564 - part 4: Make users can show Gecko specific editing UIs with new prefs r=m_kato
Even after we disable Gecko specific editing UIs by default, web apps can
enable them with execCommand.  However, until such web apps change their
behavior, users cannot use Gecko specific UIs.  At least for now, we should
make users can enable them by default.

MozReview-Commit-ID: AuAdw4FQ4He

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extra : rebase_source : a1f88f2928df0d7afb4361c425d75c74872ac9d5
2018-08-16 13:51:36 +09:00
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