I've recently switched to Firefox mobile on Android after having used Opera mobile for the past 10+ years.

The feature I absolutely love on Opera mobile is it will dynamicly wrap text and adjust the page layout to a single column when you zoom in/out. So for pages with small text, you can zoom in to see enlarged text and just scroll down to read - where on all other browsers you would have to scroll horizontally back and forth to read the enlarged text.

Opera has been doing this brilliantly for at least 10 years, and I have yet to see this on any other browsers I've tried. Does this functionality exist within Firefox, or is there a plugin that can do this?