I changed browser from Opera to FF. At the beginning I don't want Greasemonkey or other plugin.
I want to add my own JavaScript to some site. I found this topic: Manually adding a Userscript to Google Chrome
I tried this method with some changes which seems obviously for FF to me, but it didn't work. It's difficult to debug what going wrong because I don't get any error messages. Could you give me some advice what I should check?