CREATE TABLE table_64271 ("Period" TEXT, "Internet Explorer" TEXT, "Chrome" TEXT, "Firefox" TEXT, "Safari" TEXT, "Opera" TEXT, "Other Mozilla" TEXT)

What period has 0.25% as the other mozilla?
SELECT "Period" FROM table_64271 WHERE "Other Mozilla" = '0.25%'
SELECT "Period" FROM "table_64271" WHERE "Other Mozilla" = '0.25%'