Firefox: how to make tab key move between input fields only, not between links

I recently moved from Opera to Firefox because I tired of Opera's huge memory usage. But Opera's controls is really useful, so i'm trying to make Firefox behave like Opera in many cases.

One of things that i hate in Firefox: when i press Tab on some web-page, Firefox moves "cursor" between links and input fields, but i'd like it to move just between input fields, like Opera does.

Example: please go to http://developer.android.com. There is search input field in the right-top corner.

In Opera: i open this website, press Tab button 2 times, and here I am. Now i type what i want to look for, and press Enter.

In Firefox: i open this website, and press Tab button 11 times! Only after eleven keystrokes i got search input field. Really, sometimes i use mouse instead of doing it, and I strongly dislike it.

Is there a way to make Firefox behave like Opera in this aspect?

Check tab focus

Pressing Tab when a web page is in focus will move the focus from element to element. 1 Give focus to text fields only

accessibility.tabfocus = 1