I find it really unusual how many people using Firefox for a relatively long time do not know about such useful and basic features like Smart Keywords. Provided with the core of Firefox, they are a great tool for every web surfer. They basically enable you to search web faster and access your favorite websites with your keyboard only.

We can edit browser’s internal sounds’ settings (”find in page” sound) but there is no way to turn off Flash sounds in Firefox via its settings or extensions. It doesn’t mean, however, that it is not possible.

Firefox comes with a neat interface. But as you came here, I suppose you expect from your browser more than an average user.
Implicitly, you get long, unnecessary menus and redundant buttons. They just take space you could use to see web pages. So, why don’t you spend a few minutes cleaning it up so that you can get the most of it?