One major feature that makes Firefox different from other browsers is its support for the addons and extensions. Although other browsers too have support for the addons but the quality and easiness of using the addons is better in Firefox.
Try using these 15 Newest and Useful Firefox Extensions that can help you improve the productivity as well as making your online experience a lot better.
You are most welcome to suggest any additions to this list. You can use the comments box below to make any suggestions.