Hidden configuration pages offer additional settings for Edge, Chrome, Firefox browsers

The about:flags page in Microsoft Edge browser, chrome://flags page in Chrome browser and about:config page in Mozilla Firefox offer additional settings. Let us see how to access these hidden configuration pages in Edge, Chrome & Firefox browsers

Microsoft Edge, Google Chrome & Mozilla Firefox browser include a Developer Settings page, which contains numerous flags, which you can enable or disable. Most of the settings here are meant for advanced users and developers, and should not be normally be touched by common users, as they are usually configurations meant for developers or contain features which are currently in the experimental stage.

To search for a setting, it is best to press Ctrl+F and use the Search or Find bar which appears on these pages.

about:flags page in Microsoft Edge browser

To access the Developer settings page in Edge browser, you have to type about:flags in the address bar and hit Enter.

about flags edge

On the Edge about flags page you will see settings and configurations for the following:

  • Show “View source” and “Inspect element” in the context menu
  • Use Microsoft Compatibility List
  • Allow localhost loopback (this might put your device at risk)
  • Allow Adobe Flash Player localhost loopback (this might put your device at risk)
  • Enable extension developer features (this might put your device at risk)
  • Allow unrestricted memory consumption for web pages (this might impact the overall performance of your device)
  • Put on your safety goggles. These features are experimental and might lead to some unexpected browser behavior.
  • Use Windows.UI.Composition
  • Compose scrollbar thumbs independently
  • Decode images with their rendered size
  • Use a full stacking context for fixed position elements
  • Visibly Render Control Characters
  • Enable experimental select control
  • Enable @-ms-viewport rules
  • Apply scroll properties to documentElement instead of body element
  • Enable responsive scrollbar scrolling
  • Enable touch events
  • Fire compatible mouse events in response to the tap gesture
  • Enable MSPointer event interfaces
  • Disable Pointer event interfaces
  • Enable experimental JavaScript features
  • Only execute timers once per second in nonvisible tabs to improve battery life.
  • Use legacy setInterval behavior.
  • Relay hover and active state to labels associated with an element
  • Render backgrounds in high contrast
  • Media Source Extensions
  • Enable Opus audio format
  • Enable VP9 video format
  • Hide my local IP address over WebRTC connections
  • Enable experimental H.264/AVC support
  • Enable Fetch Javascript API
  • Enable experimental Web Payments API
  • Enable TCP Fast Open
  • Enable Standard Fullscreen API

As this page is constantly updated, you may find new one’s being added or some old one’s being abandoned and removed.

Visit the Edge developers page here and search for the setting if you need information about it.

This post will show you how to disable about:flags page in  Edge.

chrome://flags page in Chrome browser

To access Chrome’s hidden Developers Settings page type chrome://flags or about://flags in the omnibar and hit Enter.

chrome flags configuration pages

Here you have to click on the blue Enable link to disable the setting or vice versa. Some settings also offer you a drop-down menu, where you can make your selection.

This post lists some useful Chrome flags settings and this one the list of hidden Google Chrome URLs. This one lists some Chrome Flags tweaks for better user experience.

Tip: To see all such hidden internal pages of Chrome, type chrome://about and hit Enter.

about:config page in Mozilla Firefox

Typing about:config in Firefox’s address bar will open its developer settings page.

about config firefox

To change the settings, you have to double-click on a setting. When you do this, either its value will turn from true to false or vice versa or a value box will open where you can change the string value. Be careful before you double-click!

This post will explain some of the useful Firefox about:config tweaks.

As I mentioned earlier, these should not normally be touched by regular home users, as they are meant for developers & advanced users. Moreover, as this page includes settings which are in the experimental stage, it is constantly updated, and you may find new one’s being added or some old one’s being removed.

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Anand Khanse is the Admin of TheWindowsClub.com, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.