Instead of 90 days, petitioners now have 150 days from the date of the lower court judgment, order denying discretionary review, or order denying a timely petition for rehearing to file their petition for write of certiorari. This relaxed deadline will remain in place indefinitely. SCOTUS has modified other rules too. Read the full order here.
UPDATE: Scotusblog notes that, for civil cert petitions (which include habeas corpus cases and mental commitments) the 150 days runs into the maximum statutory deadline allowable. So, civil petitioners should not be expecting any more time; criminal petitioners would also be wise to treat the 150 days as non-extendable.