Even on this support page Firefox for Android zooms around. Let me do the "pinching." When using gmail.com auto-zoom forces right side of text entry "box" off Samsung Tab 3's display's viewport. Annoying as hell because every character you type causes screen shift when you hit right side of display viewport when entering text. I use gmail.com in firefox because Google Mail Android app is lame. You can't change color of star by using multiple clicks (only yellow on/off). Webpage allows for all star color change selections.