1. Computing

Firefox about:config Entries

The Firefox browser offers hundreds of configuration options, or Preferences, in its about:config interface. These about:config entries dictate both beginner and advanced browser behavior.

accessibility.blockautorefresh
accessibility.blockautorefresh is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The accessibility.blockautorefresh Preference in Firefox's about:config interface deals with Web pages that are configured to refresh automatically after a specific time interval.

app.update.interval
app.update.interval is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The app.update.interval Preference in Firefox's about:config interface allows the user to specify the amount of time that passes between the browser running an update check.

browser.backspace_action
browser.backspace_action is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.backspace_action Preference in Firefox's about:config interface allows the user to specify what function their backspace button will perform within the browser window.

browser.anchor_color
browser.anchor_color is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.anchor_color Preference in Firefox's about:config interface allows the user to specify the color of unvisited links within a Web page.

browser.chrome.site_icons
browser.chrome.site_icons is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.chrome.site_icons Preference in Firefox's about:config interface allows the user to specify whether or not the browser displays site icons, also known as favicons, in several locations within the browser.

browser.chrome.toolbar_tips
browser.chrome.toolbar_tips is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.chrome.toolbar_tips Preference in Firefox's about:config interface allows the user to toggle tooltips, also known as rollover text, on and off within the browser.

browser.display.background_color
browser.display.background_color is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.display.background_color Preference in Firefox's about:config interface allows the user to specify the background color that is displayed for Web pages that do not already have one defined within their code.

browser.display.foreground_color
browser.display.foreground_color is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.display.foreground_color Preference in Firefox's about:config interface allows the user to specify the foreground color that is displayed for Web pages that do not already have one defined within their code.

browser.display.use_document_colors
browser.display.use_document_colors is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.display.use_document_colors Preference in Firefox's about:config interface allows the user to specify whether Firefox displays colors (background, text, etc.) coded within Web pages and other documents or whether it r…

browser.download.folderList
browser.download.folderList is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.download.folderList Preference in Firefox's about:config interface allows the user to choose between one of three pre-specified locations in which to store file downloads.

browser.download.manager.showWhenStarting
browser.download.manager.showWhenStarting is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.download.manager.showWhenStarting Preference in Firefox's about:config interface allows the user to specify whether or not the Download Manager window is displayed when a file download is initiated.

browser.history_expire_days
browser.history_expire_days is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.history_expire_days Preference in Firefox's about:config interface allows the user to specify the amount of days worth of browsing history that is saved. Browsing history older than the numbers of days specified in this Pref…

browser.startup.page
browser.startup.page is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.startup.page Preference in Firefox's about:config interface allows the user to specify which Web page(s) is opened when their browser is initially launched.

browser.tabs.autoHide
browser.tabs.autoHide is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.autoHide Preference in Firefox's about:config interface allows the user to specify whether or not the browser's tab bar is displayed whenever only one tab is open.

browser.tabs.closeButtons
browser.tabs.closeButtons is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.closeButtons Preference in Firefox's about:config interface allows the user to manage the behavior of the close buttons that display, by default, on each open tab.

browser.tabs.closeWindowWithLastTab
browser.tabs.closeWindowWithLastTab is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.closeWindowWithLastTab Preference in Firefox's about:config interface allows the user to specify whether or not the main browser window is shut down whenever the last open tab is closed.

browser.tabs.tabMaxWidth
browser.tabs.tabMaxWidth is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.tabMaxWidth Preference in Firefox's about:config interface allows the user to specify the maximum width (measured in pixels) of individual tabs.

browser.tabs.tabMinWidth
browser.tabs.tabMinWidth is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.tabMinWidth Preference in Firefox's about:config interface allows the user to specify the minimum width (measured in pixels) of individual tabs.

browser.tabs.warnOnClose
browser.tabs.warnOnClose is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.warnOnClose Preference in Firefox's about:config interface allows the user to toggle the warning message that appears when, with more than one open tab, the browser is closed.

browser.tabs.warnOnOpen
browser.tabs.warnOnOpen is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.tabs.warnonopen Preference in Firefox's about:config interface allows the user to toggle the warning message that appears whenever an attempt is made to open a large number of tabs simultaneously. The actual number is specified …

browser.underline_anchors
browser.underline_anchors is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.underline_anchors Preference in Firefox's about:config interface allows the user to specify whether or not text links within Web pages are underlined.

browser.visited_color
browser.visited_color is one of hundreds of Firefox configuration options, or Preferences, accessed by entering about:config in the browser's address bar. The browser.visited_color Preference in Firefox's about:config interface allows the user to specify the color of links that you have already visited within a Web page.

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