Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_22 (firefox VARCHAR, opera VARCHAR, date VARCHAR)

### Question ###
What is the firefox value with a 1.8% opera on 30 July 2007?

### Accurate SQL ###

SELECT firefox FROM table_name_22 WHERE opera = "1.8%" AND date = "30 july 2007"