Firefox Android about:config Modifications

HOWTO: ALTER: Address (URL) Bar Default Behaviour
By default the Address Bar in Firefox for Android hides as you scroll down a page, to alter this to have it always displayed undertake the following:

HOWTO: ADD: Search Provider
Go to desired search engine home page.

Press and hold down on search box.

New bar will appear in place of the Address (URL) Bar with a tick on the left hand side and a magnifine glass with a plus symbol on the right hand side.

Click on the magnifine glass + icon to add the search engine, and follow any prompts.

Then click on Menu -> Settings -> Customize -> Search, your newly added search engine should appear in the list. Tap once and an options menu will allow you to set it as the default search engine or remove it.