How to Change Firefox Text Size for Easier Web Reading

Author: Ian C. Langtree - Writer/Editor for Disabled World (DW)
Published: 6 May 2009 - Updated: 24 Sep 2026
Publication Type: Instructive / Helpful

Table of Contents:
Synopsis - Definition - Overview - FAQs - Insights, Updates - Related Content

Synopsis

This information is a hands-on accessibility guide for Firefox users who find the default text on websites too small to read comfortably. It covers two approaches: quick on-the-fly resizing using the View menu or keyboard shortcuts such as Ctrl and plus or minus, and a more lasting fix that sets a minimum font size in Firefox's font preferences so small text never drops below a readable size. The guide is useful for older adults, people with low vision, and anyone with eye strain or reading fatigue, because it shows how to get larger text without buying or learning specialized assistive technology. Every step includes both a mouse method and a keyboard-only method, which also makes it practical for people who have trouble using a mouse. The guide is written by a longtime disability publisher and accessibility advocate, and the basic techniques still work in today's version of the browser.

At a Glance

• 1 - Pressing Ctrl and 0 returns the page to its default text size.
• 2 - Firefox text resizing works even on websites not designed with accessibility in mind.
• 3 - The Text Size option can be reached from the View menu by pressing Alt and V, then the letter Z.
• 4 - Some sections of a website may still refuse to resize, and Firefox did not enlarge images when only text size was changed.

Topic Definition

Browser Text Resizing

Browser text resizing is the ability of a web browser to enlarge or reduce the text on a web page, either on its own or together with the rest of the page layout, without changing the original website. In Firefox and similar browsers, this is done with zoom controls, keyboard shortcuts, or a minimum font size setting that stops text from appearing smaller than a chosen size. It is an important accessibility feature for people with low vision, age-related sight changes, dyslexia, or eye fatigue, because it lets each reader adjust content to their own needs. How well it works depends partly on the website itself - pages built with relative units and flexible layouts reflow cleanly, while rigid designs can overlap, cut off content, or leave some elements unchanged.

Overview

In the early versions of Firefox the text should still resize properly even if the website text you are viewing is not designed for accessibility. However sometimes some of the sections of the site still may not resize, which still makes it a little difficult to use some websites with the large text option enabled. Currently Firefox does not resize images.

Increase or decrease the size of the text for the web page by:

a) Open the "View" menu located at the top of your FireFox browser with the mouse or press the "Alt" and "V" keys at the same time.

b) Select the "Text Size" option with your mouse or by pressing the letter "Z".

c) You can increase or decrease the text size using the computer mouse or by pressing the up and down arrow keys and pressing the "Enter " button on your keyboard.

d) Another way to achieve the above is to press "Ctrl" and the "+" sign to increase the text size, and "Ctrl" plus "-" will decrease text size. Pressing "Ctrl" and "0" will return you to the default text size.

How to set the minimum text size in Firefox for web pages

a) Open the "Tools" menu with the mouse or press the "Alt" and "T" keys on your keyboard.

b) Click on "Options", or press the letter "O", to open the Options preferences.

c) Click the "Content" tab or use the arrow keys until it is highlighted.

d). In the Fonts and Colors preference box click on "Advanced", or press "Alt" and "D" keys to open your "Fonts" preferences.

e) Click on "Minimum font size" or press "Alt" and "O". Use the up and down arrows to select a font size and then press the "Enter" key.

f) Next click the "OK "button or press the "Enter" key.

g) Click the "OK" button or use your tab key to highlight the "OK" button and press the "Enter" key.

Changing Text Size in Other Web Browsers:

Frequently Asked Questions

Where is the minimum font size setting in the current version of Firefox?

Open the Firefox menu, choose Settings, stay on the General panel, and scroll to Fonts. Click the Advanced button, then pick a size from the Minimum font size list. Firefox will then keep text on web pages from displaying smaller than that size.

How do I make Firefox enlarge only text and not images?

Go to Settings, then General, and find the Zoom section. Check the box labeled Zoom text only. After that, the Ctrl plus and Ctrl minus shortcuts will change text size while leaving images and other page elements at their normal size.

Can I set a default zoom level for every website in Firefox?

Yes. In Settings under General, the Zoom section has a Default zoom menu where you can choose a level such as 120 or 150 percent. Every site you visit will open at that size unless you change it for a particular site.

Does Firefox remember the zoom level for each website?

Yes. By default, Firefox saves the zoom level you set for each website and applies it again the next time you visit. This lets you use larger text on hard-to-read sites while keeping other sites at their normal size.

What are the text size shortcuts for Firefox on a Mac?

On a Mac, use the Command key instead of Ctrl. Command and plus enlarges the page, Command and minus makes it smaller, and Command and 0 resets it to the default size.

Can I use my mouse wheel to change text size in Firefox?

Yes. Hold down the Ctrl key, or the Command key on a Mac, and scroll the mouse wheel up to enlarge the page or down to shrink it. Many laptop touchpads also support pinch gestures for zooming.

Is there a way to make cluttered articles easier to read in Firefox?

Firefox Reader View removes ads, sidebars, and other clutter and shows the article in a clean layout. Click the page icon in the address bar or press F9 on Windows. You can then adjust the font size, font type, line spacing, and background color.

How do I increase text size in Firefox on an Android phone?

Open Firefox, tap the menu, and go to Settings, then Accessibility. You can turn off automatic font sizing and use the slider to choose a larger font size. There is also an option to force zoom on sites that normally block pinch zooming.

Insights, Analysis, and Developments

Editorial Note: Small, fixed text is still one of the most common barriers on the web, and people with vision loss, older readers, and anyone reading on a high-resolution screen run into it every day. Browser-level controls like zoom and a minimum font size give people a dependable way to take back control of what they read without waiting for every website to be rebuilt. They are not a substitute for good design, though. The lasting fix is for developers to use relative font sizes, flexible layouts, and the text resizing standards in the Web Content Accessibility Guidelines, so pages scale cleanly for everyone. Until that becomes standard practice, a few keystrokes in Firefox can be the difference between struggling through a page and reading it with ease.

Author Credentials: Ian is the founder and Editor-in-Chief of Disabled World, a leading resource for news and information on disability issues. With a global perspective shaped by years of travel and lived experience, Ian is a committed proponent of the Social Model of Disability, a transformative framework developed by disabled activists in the 1970s that emphasizes dismantling societal barriers rather than focusing solely on individual impairments. His work reflects a deep commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.