- '__pc': self._search_regex(r'"pkg_cohort":"(.*?)"', webpage, 'pkg cohort', default='PHASED:DEFAULT'),
- '__rev': self._search_regex(r'"client_revision":(\d+),', webpage, 'client revision', default=3944515),
+ '__pc': self._search_regex(
+ r'pkg_cohort["\']\s*:\s*["\'](.+?)["\']', webpage,
+ 'pkg cohort', default='PHASED:DEFAULT'),
+ '__rev': self._search_regex(
+ r'client_revision["\']\s*:\s*(\d+),', webpage,
+ 'client revision', default='3944515'),
+ 'fb_dtsg': self._search_regex(
+ r'"DTSGInitialData"\s*,\s*\[\]\s*,\s*{\s*"token"\s*:\s*"([^"]+)"',
+ webpage, 'dtsg token', default=''),