musicbrainz.org power-ups (mbsandbox.org too): RELEASE_CLONER. copy/paste releases / DOUBLE_CLICK_SUBMIT / CONTROL_ENTER_SUBMIT / RELEASE_EDITOR_PROTECTOR. prevent accidental cancel by better tab key navigation / TRACKLIST_TOOLS. search→replace, track length parser, remove recording relationships, set selected works date / LAST_SEEN_EDIT. handy for subscribed entities / COOL_SEARCH_LINKS / COPY_TOC / ROW_HIGHLIGHTER / SPOT_CAA / SPOT_AC / RECORDING_LENGTH_COLUMN / RELEASE_EVENT_COLUMN / WARN_NEW_WINDOW / SE…