We have tried to help you with the basics of Firefox.

If you need more help and for more detailed content, You can visit Support Mozilla

If you need support for another product of Mozilla, Support can be found too,in Support Mozilla

Still got questions, You can ask in the Support Forum
If you're a developer, you'll find what you need on the Mozilla Developer Network (MDN).

MDN offers documentation, demos, and a Q&A forum where you can ask questions and interact with other developers.

Using Twitter? Tweet about your problem with a #fxhelp hashtag, Our volunteers residing all over the world will help you to get started.

We have Communities all over the world. Want to find yours? Visit Mozilla Communities Great support can also be found from your community.