[Tip] Access Hidden Secret Advanced Configuration (Experiments) Page in Your Web Browser ?

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oh, yes ! here’s how to turn of the sand boxing we never requested on Opera ? … and once we turned off that crap … it was 10 x faster … same logic applies to other browsers … who would’ve known !

LINK a bit of info from askvg.com

– Last updated on March 9, 2020 by VG

UPDATE: This tutorial was posted long time back in year 2012. Now we have updated the tutorial with new screenshots and latest information applicable to newer versions of web browsers. Also added new method to access advanced configuration or experiments page in new Chromium-based Microsoft Edge web browser.

We here at AskVG love finding hidden secret stuff in software. We have posted about hidden secret features present in Mozilla Firefox, secret debug menu in Windows games, secret about pages in Google Chrome and much more in past.

Today in this tutorial, we are going to tell you how to access hidden secret “Advanced Configuration” or Experiments pages in popular web browsers such as Mozilla FirefoxGoogle ChromeOperaMicrosoft Edge and Internet Explorer.

All these web browsers come with a secret page which allows you to enable or disable many advanced settings which are not generally available to configure from browser Options window.

Using these hidden configuration pages, you can enable many new experimental features which are disabled by default in the browser. You can also disable many unnecessary features which you don’t need or don’t like in your browser.

So if you also want to access these hidden pages, check out following simple steps:

1. Access Hidden Secret “about:config” Page in Mozilla Firefox

You must be already aware of this page because we have posted so many tutorials about this secret page of Firefox.

About:config” page allows you to tweak lots of hidden settings of Mozilla Firefox. You can enable or disable many features and options on the fly.

1. To access this page simply type about:config in Firefox’s addressbar and press Enter. It’ll ask for confirmation, click on “Accept the Risk and Continue” button. It’ll open Advanced Preferences page.

2. The page contains 3 types of preferences:

  • String
  • Boolean
  • Integer

3. You can double-click on the desired preference and change its value.

PS: You can find various interesting about:config tweaks in following exclusive articles:

[Tip] How to Restore Old About:Config Page in Mozilla Firefox

[Did You Know] Ultimate Collection of Mozilla Firefox Hidden Secret Features

Ultimate Collection of Best “about:config” Tweaks for Mozilla Firefox

Related: [Tip] How to Access “About:Config” Page in Mozilla Thunderbird

2. Access Hidden Secret “chrome://flags” Page in Google Chrome

If you are a Google Chrome user, you can access a similar secret configuration page using following steps:

1. Type about:flags or chrome://flags in Chrome’s addressbar and press Enter. It’ll open the advanced configuration or Experiments page.

2. This page contains many experimental features and other advanced tweaks which can be enabled or disabled by clicking on Enable or Disable link given below the option description.


3. As soon as you enable or disable an option, a new “Relaunch Now” button automatically appears at bottom which can be used to restart Google Chrome to take effect.

PS: There are many such secret pages in Google Chrome which can be found at following link:

Ultimate List of Hidden Secret “About” Pages in Google Chrome

3. Access Hidden Secret “opera://flags” Page in Opera

If you use Opera web browser, you can access its secret configuration page using following steps:

1. Type opera://flags in Opera addressbar and press Enter. It’ll open Opera Experiments page.


2. Here you can tweak various settings and features in Opera.

Also Check: Opera Secret Power User Settings Mode and Konami Code

NOTE: In older versions of Opera, you’ll need to use opera:config to access the advanced configuration page.

PS: There are many more similar secret pages in Opera. Just type opera: in Opera’s addressbar and a drop-down list will automatically appear showing all secret pages such as opera:cache, opera:debug, etc.

4. Access Hidden Secret “edge://flags” Page in Microsoft Edge

The new Chromium-based Microsoft Edge web browser also comes with a secret configuration page which can be accessed using following steps:

1. Type edge://flags in Microsoft Edge addressbar and press Enter. It’ll open the advanced configuration or Experiments page.

2. This page is similar to Google Chrome’s advanced configuration page and contains many experimental features which can be enabled or disabled by clicking on Enable or Disable link given below the option description.


3. As soon as you enable or disable an option, a new “Restart” button automatically appears at bottom which can be used to restart Microsoft Edge to take effect.

5. Access Hidden Secret “about:flags” Page in Old UWP Microsoft Edge

Microsoft’s latest OS Windows 10 comes with a UWP based version of “Microsoft Edge” web browser built-in. This old Microsoft Edge web browser also comes with a hidden secret experimental features page which can be accessed using about:flags URL in addressbar.


Microsoft also provides ways to disable this secret about:flags page in Edge web browser. Check out following tutorial for more details:

[Windows 10 Tip] Disable “About:Flags” Page in Microsoft Edge Web Browser

6. Access Hidden Secret Configuration Page in Internet Explorer

Unfortunately there is no such hidden secret configuration page available in Internet Explorer but you can always use Group Policy Editor to tweak various settings of Internet Explorer as well as other Windows components.

1. Just type gpedit.msc in RUN or Start Menu search box and press Enter. It’ll open Group Policy Editor.

2. Now go to following sections:

  • Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer
  • User Configuration -> Administrative Templates -> Windows Components -> Internet Explorer

3. Now you can customize and tweak various interesting and hidden settings of Internet Explorer.

=== === === === === === === === ===

So you can see almost all web browsers allow users to tweak many advanced settings using these built-in but hidden configuration pages. Take your time and enjoy tweaking your favorite web browser.


Published in: Google ChromeInternet ExplorerMicrosoft EdgeMozilla FirefoxOpera

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About the author: Vishal Gupta (also known as VG) has been awarded with Microsoft MVP (Most Valuable Professional) award. He holds Masters degree in Computer Applications (MCA). He has written several tech articles for popular newspapers and magazines and has also appeared in tech shows on various TV channels. (Connect with Us)


NOTE: Older comments have been removed to reduce database overhead.

  • Johan Gustavsson on August 28, 2012 at 3:03 am…But what about IE, doesn’t Internet Explorer have any such settings-pafe???
  • Nag on August 28, 2012 at 5:06 pmR u kidding me u didn`t knew ’bout “about:config” in FFox?
  • charles on September 4, 2012 at 1:17 pmHi,
    FYI… I tried the Opera address (you list above) opera:config=works as [ opera: ]=doesn’t… an error occurs. Either you are in error or they changed their system since you last updated this?
    Would like the new address (if there is one…)
    Thank you,
  • VG on September 4, 2012 at 11:51 pm^^ You don’t need to press enter after typing opera:. Just wait a little and Opera will show the pages list in auto-complete drop-down box.
  • George on September 21, 2012 at 6:34 pmGroup Policy Editor is not included in a lot of versions of Windows.
  • Kiwikid on September 24, 2012 at 1:44 pmOpera: Does. NOT. Work. at. all.Opera:config Does WORK
  • hax on March 28, 2013 at 1:09 pmChrome:flags cant compare to FF and Opera’s advanced config, just a few alpha/beta options there.
  • Daniel on October 9, 2013 at 8:47 pmIs it possible to modify some of these parameters to improve the performance of online games? There are many games that do not run optimally, even with a graphics card, good processor and enough ram, still there now may be assigned more resources to optimally run these games?
  • VG on October 9, 2013 at 11:33 pm^^ You can try to disable/enable GPU related options such as hardware acceleration, etc.
  • johny on February 23, 2014 at 11:32 pmcould you tell me how to set complex script in opera mobile browser. I know how to set it in opera mini browser but it is not there in opera mobile browser pls help.
  • Hadden on August 18, 2014 at 7:41 pmThere’s a manner to TOTALLY hide the tab bar? I’d like to use veritabs (extension), only.
    (I’m searching since I switched to chrome)I tried with this script, but it only creates a new window without tabs:javascript:window.open(location.href, “detab”, “toolbar=1”); window.close()Seems that chrome also hide toolbar and lock (literally) omnibar/address bar when you de-tabize it.
    Strangely, with toolbar=1, the extensions works in the new window (the script uses toolbar=0), but anything releated to tabs, including extensions, works with windows which hasn’t been de-tabized…Any suggestion, script and exotics solutions/workarounds are welcome :)
  • SunriseBoy on September 26, 2014 at 11:09 amI don’t know what version of Chrome you are talking about but after looking at the entire list, twice no such Enable Instant Extended API exists in the list.
    Go figure Captain Computer.
  • ruaman on October 6, 2014 at 5:17 amHi
    Opera has a “Power User Settings” which can be enabled by going to Settings (Alt+P), and clicking anywhere on the page (other than search bar). Then press Konami Code, that’s
    Up Up Down Down Left Right Left Right B A
  • sunny on October 15, 2014 at 4:42 amEnable Instant Extended APIYeah… it’s nowhere to be found, and I really DON’T want recently viewed sites to show up on the google search page. What a pain.
  • cliff on November 19, 2014 at 4:22 pmplease help. Living in an area were the isp only allows browsing via opera mini.i’m sure theres a method i can use to use my phone as a modem and connect using fire fox.please help.thank you
  • Tom on April 19, 2015 at 6:41 amwhen I type in “”about:flags or chrome://flags”” and hit “”ENTER”” nothing happens…
  • iouiouiou on October 19, 2018 at 2:17 amabout:config
  • Tunde Adebowale on October 17, 2019 at 12:42 amFor me I don’t know anything about google chrome congfiguration settings. If there’s a way you can make it easier I’d greatly appreciate please
  • Travis M on March 9, 2020 at 1:44 pmIt should be noted in most blink based web browsers typing “chrome:flags” will take you to the same page.For instance, typing “chrome:flags” in the new edge will take you to the flags page.
  • Prairie Frost on March 9, 2020 at 11:18 pmYou missed SeaMonkey (it is an integrated browser/email/etc). It is continually updated , free, etc.Poor investigation of EMail clients, IMO
  • SREEJITH S S on March 10, 2020 at 10:57 amgood
  • Peter on August 30, 2020 at 2:34 amIs there a hidden secret advanced config access for the browser Brave?Figured it would be the same as Firefox but I’m still probing for it
  • VG on August 30, 2020 at 8:24 am^^ Did you try chrome://flags ?
  • Peter on August 30, 2020 at 3:16 pmYeah, that did itThanks