I am running Firefox on Samsung Galaxy Mini 2 and I have found a couple of problems:

Very often the webpage is displayed like a image from a 3D TV, blurry. In this case, you can barely see the content. This also happens when you turn your phone from portrait mode to landscape mode. 2. When I click a box for filling with a text(as in the case of this feedback box), I can't see any letter. To see them, I need to press the back button to return then back on for displaying. Also, when back, the top letters can't be seen, in this case, covered by the title ask a question or simply scroll doesn't work. Could you solve this please? My phone resolution is 320x480.