Firefox includes many features to make the browser and web content accessible to all users, including those who have low vision, no vision, or limited ability to use a keyboard or mouse.
A list of common keyboard shortcuts is available in Keyboard shortcuts - Perform common Firefox tasks quickly.
Always use the cursor keys to navigate within webpages allows you to move through web content as if you were inside a read-only editor. You can use the keyboard to select web content and copy it to the clipboard.
You can press F7 at any time to turn this feature on or off. When you press F7, Firefox will ask if you really want to turn on this feature. You can disable this prompt by selecting Do not show this dialog again.
Search for text when I start typing allows you to quickly navigate to text or hyperlinks in a web page. This feature has two modes. Press / and start typing to search all text on the current page, or press ' before your string to search hyperlinks only. Firefox will highlight matching text or hyperlinks as you type.
The following keyboard shortcuts control this feature:
If this option is checked, you can start typing at any time to auto-start an inline search. By default auto-started searches look for all text on the page. You can still explicitly press ' or / to start finding in one mode or the other.
You can use this feature to get to buttons, text boxes and other form controls. Search for the text immediately before the form control you want and press Tab. Pressing Tab automatically exits the search and sets focus to the next form field or button after the highlighted text.
On some web pages, keyboard shortcuts are assigned to different elements on the page. To move the cursor directly to one of these elements, press Shift+AltCtrl + option+AccessKey.
A list of common mouse shortcuts is available in Use mouse shortcuts to perform common tasks in Firefox.
You can zoom in and out of web pages including images with the following keyboard shortcuts:
For other ways to zoom in and out a web page, see Font size and zoom - increase the size of web pages.
You can choose to change the text size only using the Text Zoom feature:
The following keyboard shortcuts control text size when Text Zoom is selected:
Note that some web pages may display incorrectly if you increase or decrease the text size.
For other ways to zoom in and out text of a web page, see Font size and zoom - increase the size of web pages.
See Change the fonts and colors websites use for detailed instructions on choosing your preferred font styles and colors.
Some websites may display text which is too small to read comfortably. To make such pages easier to read, you can set a minimum font size. On web pages that try to display text smaller than this size, Firefox will enlarge the text to your chosen size.
To set a minimum font size, open the OptionsPreferences window, select the Content panel, and click the Advanced… button in the Fonts & Colors section. You can specify a minimum font size from the dropdown menu.
Note that some web pages may display incorrectly depending on your choice of a minimum font size.
Some websites may display text in fonts that are difficult to read, and other sites may rely on the browser's default fonts. You can set your default fonts by opening the OptionsPreferences window, selecting the Content panel, and selecting a default font and size in the Fonts & Colors section.
You can specify default fonts for different styles, including serif, sans-serif, and monospace by clicking the Advanced… button. However, many web pages specify their own fonts, so your choices will have no effect on such pages. To override the fonts defined by such pages, uncheck the Allow pages to choose their own fonts, instead of my selections above optionpreference.
Note that some web pages may display incorrectly depending on your choice of a default font.
Some websites may display text and background colors that are difficult to read, and other sites may rely on the browser's default colors. You can set your default colors by opening the OptionsPreferences window, selecting the Content panel, and clicking the Colors… button in the Fonts & Colors section. You can set default text and background colors, as well as default colors for visited and unvisited hyperlinks. You can also specify whether hyperlinks should be underlined.
However, many web pages set their own colors, so your choices will have no effect. To override the colors defined by web pages, uncheck the Allow pages to choose their own colors, instead of my selections above optionpreference.
Firefox automatically detects if you are using a High Contrast theme and displays everything in your high contrast color scheme. This overrides all other other browser or web page settings, and it affects the Firefox interface itself (all menus, windows, and dialog boxes) and the content of any web page you visit.
To use a High Contrast theme, go to Start Menu, select Control Panel, then Accessibility Options, finally Display and check the Use High Contrast option.To use a High Contrast theme, go to Start Menu, select Control Panel, then Appearance and Personalization, finally Change the theme and choose one of the High Contrast themes.To use a High Contrast theme, open the charms panel, select Control Panel from the Settings charm, then Appearance and Personalization, finally Change the theme and choose one of the High Contrast themes.To use a High Contrast theme, go to Start Menu, select Settings, then Accessibility, finally High Contrast on the left. Choose one of the High Contrast themes in the drop down menu and click Apply.
See Pop-up blocker settings, exceptions and troubleshooting for information on blocking pop-up windows.
Some web pages provide a rich interactive experience with Java™ applets. However, some users that rely on keyboard navigation may experience problems with some Java applets that automatically set focus and do not provide a way to break out of the applet and navigate to the rest of the web page. If this is a problem for you, you can disable Java by opening the add-on manager, selecting the Plugins panel, selecting the Java item(s) in the list, and then selecting Never Activate.
A screen reader is a software application that attempts to identify and interpret what is being displayed on the screen (or, more accurately, sent to standard output, whether a video monitor is present or not). This interpretation is then re-presented to the user with text-to-speech, sound icons, or a Braille output device. Screen readers are a form of assistive technology (AT) potentially useful to people who are blind, visually impaired, illiterate or learning disabled, often in combination with other AT, such as screen magnifiers. The above was adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 3.0 license.
Here are a list of screen reader software and links to common ones: