Firefox Mobile addons I can't live without :

Fastest Scroll In The West : Scroll quickly the page. For navigation in long or large pages.

Adblock Plus : Annoyed by adverts? Troubled by tracking? Bothered by banners? Install Adblock Plus now to regain control of the internet and change the way that you view the web.

Lazy Click : Fixes missed clicks by applying them to the closest clickable object (link, button). This is especially useful on touchscreen displays, where it can be challenging to hit a smaller link or button with your finger