Works for zooming in (kind of) but not zooming out.
Usually I want to make the text smaller, and that doesn't seem to work...

This should be implemented in Firefox by default! Great extension!!

Excellent! It's very convenient when zoom on mobile phone, you needn't to slide webpage frequently anymore!

Finally someone did it, im sure you know it has issues but THANKS A MILLION, been waiting for something for Firefox forever. I hope you continue to improve it