Overriding Page Colors

Overriding Page Colors

Some web sites 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 going to Tools > Options, 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 option.

Using a High Contrast Theme

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 > Control Panel >Accessibility Options > Display and check the Use High Contrast option.

Controlling Web Content

Blocking Popup Windows

See Controlling Popups for information on blocking popup windows.

Turning Off Java Applets

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 going to Tools > Options, selecting the Content and unchecking the Enable Java option.

Restricting JavaScript Behavior

You can turn off JavaScript entirely by going to Tools > Options, selecting the Content panel, and unchecking Enable JavaScript. Some web pages rely on JavaScript and may not work properly if JavaScript is disabled.

If you do not wish to disable JavaScript entirely, there are also a number of advanced JavaScript settings to restrict the behavior of scripts. Immediately after the Enable JavaScript checkbox, click the Advanced button to open the Advanced JavaScript Settings window. You can control whether scripts are allowed to move or resize existing windows, raise or lower windows, disable or replace context menus, hide the status bar, or change status bar text.

Compatibility With Assistive Technologies

The latest information about compatibility with third-party assistive technologies is online at Access Mozilla: Compatibility with assistive technologies.