Font size and zoom - increase the size of web pages

Revision Information
  • Revision id: 15387
  • Created:
  • Creator: scoobidiver
  • Comment: added Text Zoom section, on a website basis, added a link to the Default FullZoom Level add-on, magnifying glass icon specific to Linux, added Win toolbar screenshot
  • Reviewed: No
  • Ready for localization: No
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Revision Content

The zoom is a feature which allows you to increase or decrease either the size of a web page (Page Zoom, which is the default zoom) or the size of all text displayed in a web page (Text Zoom) in order to improve readability on a website basis. This article explains how to zoom in and out per website and describes the zoom text settings.

  • If you want to set the default zoom level for all websites, use for instance the Default FullZoom Level add-on.

How do I zoom in and out?

There are several ways to zoom in and out.

Keyboard

  • To zoom in, increasing the size, press and hold commandCtrl while pressing &#43.
  • To zoom out, decreasing the size, press and hold commandCtrl while pressing -.
  • To reset size back to normal, press and hold commandCtrl while pressing 0.

Mouse

If your mouse has a scroll wheel, press and hold Ctrl while scrolling up to zoom in and down to zoom out.

Menu

  1. Press the Alt key to temporarily bring up the traditional Firefox menus. At the top of the Firefox windowOn the menu bar, click the View menu, then go to Zoom.
  2. Select either Zoom In, Zoom Out, or Reset for their corresponding action.

Toolbar

  1. Right-click on an empty section of the Tab Strip, select Customize... and the Customize Toolbar window will open.
  2. In the Customize Toolbar window, click and drag the "Zoom Controls" toolbar item to the desired place on one of your toolbars.
  3. Click Done to save the changes to your toolbars. Two new magnifying glass icons will be added to your toolbar, one with a plus (+) and one with a minus (-).Zoom Controls
  4. You can now use the + magnifying glass icon on the customized toolbar to zoom in, and the - magnifying glass icon on the customized toolbar to zoom out.
    Zoom Control - Win

To customize other aspects of your toolbars, please see Customize Firefox controls, buttons and toolbars.


How do I use Text Zoom?

How do I switch to Text Zoom?

To switch to Text Zoom:

  1. Press the Alt key to temporarily bring up the traditional Firefox menus. At the top of the Firefox windowOn the menu bar, click the View menu, then go to Zoom.
  2. Select Zoom Text Only, which will make the controls only apply to text, not images.

How do I set the minimum text size for Text Zoom?

You can configure Firefox to display all text at a minimum font size. If a web page contains text that is smaller than your defined minimum size, Firefox increases the font size of the text to this minimum. To set a minimum text size:

  1. In the Menu bar at the top of the screen, click Firefox and then select Preferences or Settings, depending on your macOS version.Click the menu button Fx89menuButton and select Settings.
  2. Select the Content panel.
  3. In the Fonts & Colors pane, click Advanced....
  4. In the Minimum Font Size drop-down, select the minimum size in pixels in which all text must be displayed.

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