[Windows 10 Tip] Enable Hidden “Diagnostics” Options on “About:Flags” Page in Microsoft Edge
If you use the built-in “Microsoft Edge” web browser in Windows 10 operating system, this article will be interesting for you. You might be knowing that Microsoft Edge comes with a hidden secret advanced configuration page which can be accessed by using about:flags URL in the address bar. We told you about this secret about:flags page present in Microsoft Edge in our following exclusive review topic:
[Review] Microsoft Edge (or Spartan) Web Browser in Windows 10
This secret about:flags page is quite similar to the advanced configuration pages present in other popular web browsers such as about:config page in Mozilla Firefox, chrome://flags page in Google Chrome and opera://flags page in Opera web browser. All these pages are generally hidden and allow users to turn on/off advanced settings and options which can change the web browser’s functionality and performance.
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When you open about:flags page in Microsoft Edge browser, it shows following 2 sections:
- Developer Settings
- Standards Preview
But did you know this secret page also contains some extra options which are hidden by default. Yes, this secret page also contains another section called “Diagnostics“.
To reveal this extra section, you just need to press following keys together:
Ctrl+Shift+D
As soon as you press the above mentioned key combination, it’ll enable the hidden “Diagnostics” section on the about:flags page.
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This extra section contains following options to customize:
Composition:
- Composition engine [Release | Canary]
Text input and editing:
- Enable input through new insert commands – [ON]
- Enable new InsertParagraph command – [OFF]
- Enable TFS3 implementation – [ON]
- Enable WinRT Clipboard APIs – [ON]
JavaScript:
- Disable requestAnimationFrame callbacks fro cross-origin iframes when not visible. – [ON]
- Force setTimeout and setInterval to 1 second periods for cross-origin iframes when not visible. – [ON]
- Allow background tabs to be put into low power mode. – [ON]
- Force setTimeout and setInterval to 30 seconds on background tabs instead of 1 second. – [OFF]
- Force setTimeout and setInterval to 30 seconds on non-visible cross-origin iframes instead of 1 second. – [OFF]
- Force frame rate to 30 fps instead of 60 fps. – [OFF]
- Disable high frequency script timers, forcing script timers to a max frequency of 16ms. – [OFF]
- Force setTimeout and setInterval to 1 second periods when the page is loading. – [OFF]
- Allow the render pipeline to be throttled to improve battery life. – [ON]
Screen Capture:
- Enable Screen Capture – [OFF]
Networking:
- Enable TCP Fast Open [Always on | Automatic | Always off]
Element properties:
- Relay hover and active state to labels associated with an element – [OFF]
It seems Microsoft is experimenting with these options present in about:flags page and may add/remove more options in future Windows 10 versions.
Also Check:
[Windows 10 Tip] Disable “About:Flags” Page in Microsoft Edge Web Browser
Didn’t work.
Opened about:flags (it showed the default simplified version) from that screen, pressed ctrl+shift+D (yes, in tandem) and nothing happened.
How do I do this better?
Edge About:flags only shows the simple version. If there is an developer mode, how do I access it? I pressed ctrl+shift+D together and it brings up bookmark favourites…
^^ The trick was posted for UWP version of Microsoft Edge browser which came preinstalled with Windows 10.