Settings for web content, pop-ups, fonts, and languages

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The Content panel in Firefox OptionsPreferences includes settings related to how a website's content is displayed. This article explains what settings are available.

Content Settings

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Fx44ContentPanel-win7 Fx44ContentPanel-winxp Fx48ContentPanel-Mac

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DRM Content

DRM Content

DRM Content


Firefox lets you choose which websites are allowed to send you notifications. To learn more, see the article Web Push notifications in Firefox. Click Choose… to make changes to the list of allowed sites.

  • Do not disturb me: Select this optionpreference to temporarily suspend all notifications until you close and restart Firefox. This setting is not available on some operating systems.
  • Do not disturb me: Select this option to temporarily suspend all notifications until you close and restart Firefox.


  • Block Pop-up Windows: By default, Firefox blocks annoying pop-up windows on websites. Unchecking this optionpreference will disable pop-up blocking.
    Some websites make legitimate use of pop-up windows. Therefore, you can allow these sites to open pop-ups anyway. To do so, click Exceptions…, enter the site name, and click Allow. To remove a website from the list, select it and then click Remove Site. To clear the list completely, click Remove All Sites. For more information, see the Pop-up blocker settings, exceptions and troubleshooting article.

Fonts & Colors

Default font and Size: Web pages are usually displayed in the font and size specified here (measured in pixels). However, web pages can override these choices unless you specify otherwise in the Fonts dialog. Click the Advanced… button to access the Fonts dialog and to change this and other fonts optionspreferences.

Fonts Dialog

  1. From the Fonts for drop-down list, choose a language group/script. For instance, to set default fonts for the West European languages/scripts (Latin), choose WesternLatin. For a language/script not in the list, choose Other LanguagesOther Writing Systems.
  2. Select whether proportional text should be serif (like "Times New Roman") or sans-serif (like "Arial"). Then specify the font size you want for proportional text.
  3. Specify the font to use for Serif, Sans-serif and Monospace fonts. You can also change the size for Monospace fonts.

You can also set the minimum web page font size. This is useful to prevent sites from using overly small fonts that are barely readable.

  • Allow pages to choose their own fonts, instead of my selections above: By default Firefox uses the fonts specified by the web page author. Disabling this optionpreference will force all sites to use your default fonts instead.
  • Character Encoding for Legacy Content: The character encoding selected here will be used to display pages that don't specify which encoding to use.

Colors Dialog


Text and Background: Here you can change the default text and background color to be used on web pages that haven't specified that information. Click on the color samples to select colors.

  • Use system colors Check this optionpreference to use the colors defined in your operating system settings instead of the colors specified above.

Link Colors: Here you can change the default colors for Web links. Click on the color samples to select colors.

  • Underline links: By default, links are underlined on web pages. Uncheck this optionpreference to disable this. Note that many sites specify their own styling rules and this optionpreference has no effect on those sites.
  • Override the colors specified by the page with my selections above:
    • Always: Select this optionpreference to force all sites to use your default colors.
    • Only with High Contrast themes: This optionpreference will make Firefox use the colors specified by the web page author, except when you are using a High Contrast WindowsLinux theme.
    • Never: Select this optionpreference to make Firefox use the colors specified by the web page author.


Some web pages are offered in more than one language. Click the Choose… button to specify your preferred language or languages.

Languages Dialog: To add a language, click Select a language to add…, choose the language, and click the Add button. Remove a language by selecting it in the list of active languages and clicking the Remove button. You can also reorder languages using the Move Up and Move Down buttons to determine the most preferred one in case a page is provided in multiple languages.

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