CREATE TABLE table_66074 ("Period" TEXT, "Internet Explorer" TEXT, "Firefox" TEXT, "Chrome" TEXT, "Safari" TEXT, "Opera" TEXT, "Other Mozilla" TEXT, "Mobile" TEXT)

What percentage of users were using Safari during the period in which 30.82% were using Firefox?
SELECT "Safari" FROM table_66074 WHERE "Firefox" = '30.82%'
SELECT "Safari" FROM "table_66074" WHERE "Firefox" = '30.82%'