About this Add-on
To change the settings, tap on "Bigger Text" in the add-on manager. You can change how large text appears when a page first loads, and how much large to make it when "Bigger Text" is turned on.
Source code is available at http://hg.mozilla.org/users/mbrubeck_mozilla.com/biggertext/
This add-on is not compatible with your version of Mobile because of the following: