Firefox: How to change the zoom increment?

Question

How do I change the zoom increment that is used by Firefox whenever I zoom-in or zoom-out of webpages? I find that the default zoom increment is a bit too big for my taste.

Answer 1

You can do this as follows (tried it with FF 10.0.2 here):

• Type about:config in the address bar
• Filter for toolkit.zoomManager.zoomValues

This will show you the various zoom "steps" the browser has. The steps are specified as as decimal numbers (representing precentages of the original, so .3 means 30% of original) separated by a ,. See here for the details.