CREATE TABLE table_79525 ("Date" CLOB, "Internet Explorer" CLOB, "Firefox" CLOB, "Safari" CLOB, "Opera" CLOB)

What is the firefox value with a 1.8% opera on 30 July 2007?
SELECT "Firefox" FROM table_79525 WHERE "Opera" = '1.8%' AND "Date" = '30 july 2007'
SELECT "Firefox" FROM "table_79525" WHERE "Date" = '30 july 2007' AND "Opera" = '1.8%'