[AdGuard for Windows] v6.3.1399 RC

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6.3.1399.4073 RC

Once you go deep enough into the release candidate streak, it becomes to stop. In this one we decided to go a little aggressive with our fixes and addressed an issue that only appears in Windows Insider Preview.

[Fixed] Toast notifications are broken #2278

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This is a very small update aimed at fixing a couple of minor issues.

[Improved] Do not allow auto-switch update channel within the process of the upgrade #2269
[Fixed] MS Edge is not filtered in the Windows Insider Preview #2270
[Fixed] User script name being corrupted while export settings #2275

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Few more fixes before the new release.

  • [Changed] Do not ignore HTTP headers with an empty value #2264
  • [Fixed] Incorrect exception rule is created with Assistant #2265
  • [Fixed] HTTPS filtering issue with Android Messages #2266
  • [Fixed] Windows notification center is unavailable after first install #2268
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Tidying up some last minute issues before the upcoming release. Among the noticeable changes is a new option to switch between preferred versions of the TLS protocol.

[Added] An advanced setting that lets switching between TLS 1.2 and 1.3 #2242

TLS v1.3 support was added in the previous beta version, but this protocol is not universally supported yet, so it makes sense to provide an option to disable its use to avoid possible incompatibilities.


[Changed] The first screen of the installer #2240
[Fixed] Parental control module doesn't save sensitivity level choice: #2257
[Improved] Better support for visually impaired users #2068


[Changed] Restrictions on the length of non-script and non-style elements have been removed #2237
[Fixed] Crash while closing from the tray #2252
[Fixed] Suppress browser cache on a GM storage state change: #2258
[Fixed] AdGuard is not injected into tweakers.net: #2260
[Improved] Traditional Chinese translations for filters have been updated #2245

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This beta version is a powerhouse in terms of additions and changes. The addition of TLS 1.3 support is the headliner, read below what’s so cool and important about it. Good news for those users who resort to screen readers — AdGuard has become more friendly towards them. Filter updates will now take much less time.

[Added] TLS1.3 Support (draft 28) #2155

TLS 1.3 is a new version of the cryptographic protocol used to encrypt messages sent via HTTP. It is faster, more secure and overall better than its predecessors. It has not been accepted by IETF as a standard yet, but it is only a matter of time. The process has already started, and we want to be at the forefront, and thus we have already added the TLS 1.3 (draft 28) support.

[Improved] Filters update procedure's performance #2211

If you had the misfortune of a habit to update your filters often, you certainly noticed that it took quite a lot of time, as well as installing new filters. We addressed this problem, the situation should change drastically for the better now.

[Improved] Better support for visually impaired users #2068

AdGuard tries to provide the best online experience for all users alike, and visually impaired users are no exception. Starting with this beta, AdGuard menus are much better suited to be read by NVDA Screen Reader and other screen reading programs.

Ad blocking

[Fixed] Manually added to “filtered apps” applications get removed after an update #2195
[Fixed] Cannot parse CSP from a meta tag #2207
[Fixed] HTML parser fails on cbc.ca #2221
[Fixed] Windows notification center is unavailable #2181


[Changed] Common API response format to use for XHR and WS APIs #2228
[Added] The approach we use to switch the update channel for default userscripts #2177
[Improved] Method for detecting untrusted certificates has been improved in accordance with Chrome policy #2171
[Fixed] Invalid HTTP response header prevents a website from opening #2188


[Added] A notice to inform the user about closed connections to websites with EV certificate #2015
[Changed] More details added to "AdGuard service" description #422
[Fixed] AdGuard breaks encoding of a custom filter #2232
[Fixed] Incorrect version of custom filter is displayed after an update #2206
[Fixed] Filter status change is not applied #2180
[Fixed] The disclaimer in "About" window is hidden while updating #2165
[Fixed] Incorrect “time updated” value is shown after filter remove/install #2220
[Improved] Handling of plural forms in localizations #2046


[Added] Swedish localization #2173
[Fixed] "Traditional Chinese" language file title #2190
[Fixed] Application update clears userscripts' storage even for the same update channel #2194
[Fixed] Cannot export settings in nightly builds #2204
[Fixed] The ~ symbol looks like - in Parental control settings #2219
[Fixed] Tab and arrow keys can be used while in the password protected menu #2012
[Fixed] Userscript's require and resources parameters are not exported along with with its contents #2212
[Improved] AdGuard.tools can now be run as a "true" win64 process on 64-bit OS #1809

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Hello! Anybody here? There hasn’t been a new Windows beta for so long, we are not sure anymore :) Hopefully, you are still aboard, and you will find the new beta worth the time spent. We believe it is — among other important stuff we greatly reduced the build size, almost twice compared to its former self. Oh, and there’s a new update channel now — Nightly. Intrigued? You should be. Read on to find the details.

[Changed] Default builder has been drastically reworked #1965

Basically, this is the change that caused the build size reduction that was advertised in the introduction. As the app accretes new features over the years and the code mounts up, this becomes more and more relevant. Thanks to this change, now we can add even more!

[Added] Nightly update channel

This has recently been covered in the Blog article, but I’ll give the brief explanation here too.

The concept of a “Nightly” build is very simple. It literally means “a build that is released at the end of every day”, hence “nightly”. In reality, it may not happen every single day, but rather every 3 or 4 days, but the idea is there. All the latest changes made by developers will be included in the nightly build (yes, including possible bugs — be prepared!). If you feel that beta is not enough for you, and you need to be a step ahead of the rest, this is the choice for you. Just go to AdGuard settings and switch to Nightly update channel.

Ad Blocking
[Added] Support for subscribing to a filter by clicking a special link on a webpage #1945
[Fixed] "Block Flash" setting doesn't block Adobe Flash #2058
[Fixed] AdGuard cannot start protection after installing an update #2033
[Improved] ExtendedCss has been updated to version 1.10 #2152

[Changed] Update TDI, WFP drivers and libs #2089
[Changed] Symantec certificates have been deprecated #1634
[Changed] Existing connections of filtered apps are closed now on AG startup #1977
[Changed] Problem with Github discontinuing TLS 1.0/1.1 support has been addressed #2098
[Fixed] CSP issue at github.com #2151
[Fixed] The issue with FIPS security error on license check #1033
[Fixed] ipleak.net and other online tests show as if AdGuard does not block WebRTC #1995

[Added] Show in the Filtering log Stealth mode options applied to requests #247
[Added] A “Beautifier” to the Filtering log and userscripts editor #1671
[Changed] Users are now informed about closed connections to websites with EV certificates #2015
[Changed] Change 2017 to 2018 for all existing entries #2079
[Changed] Japanese, Norwegian localizations added, other updated #2088
[Changed] Filtering log — long rules now collapse while in detailed mode #1845
[Changed] Parental control password is now hidden while typing #1816
[Changed] Old links have been replaced with new ones #2102
[Fixed] Logo issue #2095
[Fixed] "Referer" field is now disabled unless "Hide Referer" is enabled #2025
[Fixed] Filter editor bug when pressing backspace #1439
[Fixed] GUI hangs when enabling/disabling filter lists #2036
[Fixed] Can’t export/import configuration in Spanish localization #2018
[Fixed] Sometimes app crashes after adding an HTTPS exclusion #2024

[Changed] Digital signature and description #2045
[Fixed] block_third_party_auth parameter does not work #2073
[Fixed] App has crashed while being closed from tray #2019
[Fixed] Wrong folder is opened after the export operation is finished #2123

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Beta Tester
Updated smoothly and no issues observed yet. Well done! Oh, maybe one thing is worth to mention. Right after update I noticed a high CPU usage of Viber for PC that is filtered by AG. I had to shut down Viber and restart it to get back to normal CPU.

PCS ProShop

New Member
Working great. Installation & Post installation browsing, seems quite smooth [transparent].

One note: I do NOT see any filtering notes on the Git' about JOOMLA website ad filtering or blocking. Nothing critical, or even noteworthy, save for the "X We have detected that you are using an ad blocker. The Joomla! Project relies on revenue from these advertisements so please consider disabling the ad blocker for this domain." notice in the page footer.

Have NOT tested this page, pre-beta update. Unsure of where to post this, so I'm just going to "drop" this here.

Tested in Google Chrome | Win10 Pro (4/19/18 OS Update).

BTW: Looks like some pretty great options in Beta, really like it! TX.


New Member
Can't install v6.3.1118 Beta. If I try through the program, it sits at Starting update. If I try to run the EXE, it says "Adguard is already installed". Any advice to installing this version? Never had a problem installing an update before.


New Member

I'm a new beta tester.
For the first time, today I installed ADGUARD 6.3.1118
I have a key, and activate it.

I use Firefox Beta (latest version).
Every page I try to browse, a blank page appears, with the following message: "Your connection is not secure... the owner of xxxxxxx.com... Error code: SEC_ERROR_UNKNOWN_ISSUER".
I tested with Firefox stable.
I also tested with Waterfox.
Every page in a Firefox browser, different versions, same error message.

However, IExplorer and Edge are working fine.
It's seems a problem related exclusively with ADGUARD and Firefox, at least in my computer.

I appreciate your help.

Thank you!

Last edited:


New RC is out, hopefully it will be release on Monday, please let me know if something goes wrong, guys.


Beta Tester
it is still blocking picture sending in viber desktop. Since viber 8.2 whenever you try to send a picture in viber the message fails to send. Sending as file works, but direct image message is blocked.
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