Author Topic: Firefox Zoom Values  (Read 559 times)

Offline scuzzy

  • Forum Cop
  • Administrator
  • xTreme Super Poaster
  • *****
  • Posts: 9359
  • In an emergency, 9-1-1 calls me.
Firefox Zoom Values
« on: Jan 27, 2017, 06:52 PM »
I use Firefox as my primary browser, and I often find myself zooming in/out of web pages. But I find the default zoom values are somewhat limiting. Fortunately it is easy enough to create your own custom value list.

NOTE: The easiest way to zoom in/out while on a web page is by using the combination keyboard shortcuts "Ctrl +" and "Ctrl -", which respectively increase and decrease the zoom levels. The combination shortcut "Ctrl 0" (zero) resets the zoom value to 100%. Any changes to the zoom level for a particular web page will be kept until you reset it, even if you restart Firefox.

By default, Firefox zoom values are set to: .3,.5,.67,.8,.9,1,1.1,1.2,1.33,1.5,1.7,2,2.4,3

These default values allow the user to zoom from 30% to 300%, using 14 predefined levels.

I changed the zoom values on my Firefox browser to:


This change allows me to zoom from 30% to 300% with 43 predefined levels; most 5% apart from each other. This gives me far more options on the zoom levels, and provides a much smoother experience. (I omitted 1.9 and 2.9, as they normally don't work for me.)

To change the zoom values, enter "about:config" (without the quotes) into the address bar. You may receive a scary warning about voiding the warranty and other potential problems. If you get the warning, click "I accept the risk!" to reach the configuration screen. In the search bar, type in "zoomValues" (without the quotes). Double-click the line "toolkit.zoomManager.zoomValues" to bring up the zoomValues entry box, and then copy/paste the above values into the box.

NOTE: I broke my custom zoom values into a 2nd line to make it easier to copy/paste. This will add a space between 1.4 and 1.45 when you paste it into the value box. Although it will work fine with the space, you can easily delete it if you wish.

Once you make the adjustments in the zoomValues box, click OK and then close out the configuration tab. The new changes are automatically saved, but you may need to restart Firefox to take advantage of the new defaults.

If you wish to create your own custom value list, I recommend using a text editor and then copy/paste it into the zoomValues box. This will make it much easier than trying to do it one-by-one in the zoomValues box. Keep in mind that Firefox will not zoom lower than 30%, or higher than 300%, and make sure that each value is separated by a comma.

BONUS: If you are using Firefox 51 or above, you can see the zoom value at the end of the address bar. The value is not displayed for the default 100%.