pls somebody tell me how to stop quick find from popping up whenever i press / key

[WINDOWS7USER]

pls somebody tell me how to stop quick find from popping up whenever i press" / " key. Especially a problem when i am using web calculator or math tool

[siffemcon]

Type about:config in the address bar > press Enter

- click 'Accept the risk and continue' if that appears

Search for and set these preferences to false:

accessibility.typeaheadfind
accessibility.typeaheadfind.manual