Hello Hossmf, see already known [https://support.mozilla.org/en-US/products/firefox/tips tips and tricks] and : http://www.tweakguides.com/Firefox_1.html (it is only a little bit of knowledge in the above articles) if you want to contribute for a start see : [https://support.mozilla.org/en-US/kb/how-the-knowledge-base-works#os=win8&browser=fx17 How the Knowledge Base works] i'm sure other contributors/helpers help you more(with more links) '''''try it, it worth it''''' thanks