CREATE TABLE table_13304 ("Period" CLOB, "Internet Explorer" CLOB, "Firefox" CLOB, "Safari" CLOB, "Opera" CLOB, "Netscape" CLOB, "Other Mozilla" CLOB)

What percentage of users were using Firefox during the period in which *0.77% were using Netscape?
SELECT "Firefox" FROM table_13304 WHERE "Netscape" = '*0.77%'
SELECT "Firefox" FROM "table_13304" WHERE "Netscape" = '*0.77%'