by Martin Brinkmann on October 31, 2014 in Security - Last Update: October 31, 2014 - 33 comments

The new version of Firefox v60 is currently being disabled from connecting to any site by AVG Webshield. This needs to be corrected. I shut off Web Shield and resolved the problem.
Avast 2018 Web Shield Has Blocked a Threat Pop-up Solution/Fix for the Invalid Certificate Issue Caused by the HTTPS Scan Recently a lot of Avast users (especially the ones running Windows XP) are experienced an issue when Avast has been blocking several major websites because of the invalid cloudflaressl.com certificate.

Security companies such as AVG, Kaspersky or Avast release new versions of their products each year to the public. The updates do introduce new features from time to time and may also change the interface of the program as well.

Avast released its 2015 lineup recently and one of the new features that all of its antivirus programs ship with is HTTPS Scanning.

It enables the program to detect and decrypt protected traffic using its web filtering component. This alone is highly problematic considering that the program is tapping right into protected data streams but the current implementation is causing all kinds of issues on top of that.

Let's assume the problem is that Firefox's requests are being intercepted and filtered by the Avast Web Shield feature. In order to check the contents of HTTPS connections, Avast needs to generate fake site certificates.

Update: An update to the most recent version of Avast or Firefox seems to resolve the issue.

Firefox users for example may notice that the browser won't close anymore because of Avast's HTTPS Scanning feature. This may not happen all the time when Firefox is closed but users reported that it is happening frequently.

That's however not the only issue that Firefox users may experience if Avast is installed on the computer system the browser is running on.

Firefox's add-on update check may be blocked by the security software as well.

The Mozilla Firefox web browser is not the only program that is affected by issues though. Spotify's Web Player may not be able to connect to Spotify for example with Avast 2015 running on the system.

Users who experience issues after installing the latest version of Avast 2015 have two options:

Disable HTTPS Scanning.
Uninstall Avast completely.

It is thankfully pretty easy to disable HTTPS Scanning in the application.

Open the Avast dashboard on the affected system.
Select Settings from the left sidebar menu.
Switch to Active Protection.
Click on Customize next to Web Shield.
Uncheck the 'Enable HTTPS Scanning' option and click ok.

This turns off the feature in Avast and problems that you have experienced should be a thing of the past.

Mac miller spotify vinyl buy. There is no option to turn off the HTTPS Scanning feature in Avast during installation. While you can disable the Web Shield during installation, it impacts more than just HTTPS scanning and is generally not recommended. (thanks Sören)

Avast's HTTPS Scanning interferes with Firefox and other programs

Description

The new HTTPS Scanning feature of Avast 2015's Web Shield interferes with programs such as Firefox or Spotify. Find out how to resolve the issues.

Author

In very rare cases, Avast may detect and block some programsor website pages as a virus, although you know for sure it’s safe. These wrong detections are called false positives. If such false-positive detection prevails after the virus definitions update, you may want to exclude the detected software or website from the Avast scan.

This is a perfect fix when Avast is blocking one of your favorite programs, but you still want to run/allow it. In the past, Avast was blocking some of the most popular software (Steam for example) for a short period of time. To be fair false-positive detection happens basically to every antivirus on the market, it’s not just Avast.

Anyway, we strongly recommend scanning the file/webpage also through some other virus engines to make sure it’s really clean. For this, you can use a free online scanner VirusTotal. Sometimes you may think the file/URL are safe but they are actually infected and it’s not just Avast which is detecting them.

Quick Summary

Make sure the blocked file or webpage is not malicious by testing it at www.virustotal.com
Add it as an exception by going to Settings » General » Exclusions
Confirm by clicking OK

Read more detailed steps and other options including screenshots below.

In this guide, you will learn how, but we strongly suggest using exclusions only when you’re an advanced user. There are three basic types of exclusions/exceptions in the Avast Antivirus 2019:

Global exclusion list of the folder/file/program/application from being scanned at all
Global exclusion list of the website/URL from being scanned at all
Exclusions in the specific shield (File System Shield, Mail Shield, or Web Shield)

Global Whitelist – Exclude Specific Folder/File/Program/Application from All Avast Scans

If you want to add the exception for the specific website, domain, or URL from being scanned by Avast, follow these steps. This is so-called Global Whitelist or Exclusion List.

Open the Avast user interface and go to ‘Settings‘ » ‘General‘
Find the tab ‘Exclusions‘ and add specific programs to the ‘File paths‘ tab
Added applications and/or paths will now be excluded from any Avast scanning

Adding File/Folder/Program Exception into Avast 2019

On the screenshot above you can see that application ‘FileZilla FTP Client‘ and ‘DAEMON Tools Lite‘ are excluded. Such exceptions also apply to all sub-folders on these folders as we have used ‘/*’ in the path.

Global Whitelist – Exclude Specific Website/URL from All Avast Scans

If you want to add the exception for the specific Avast shield, follow these steps.

Open the Avast user interface and go to ‘Settings‘ » ‘General‘
Find the tab ‘Exclusions‘ and add specific websites or URLs in the ‘Urls‘ tab. Please note ‘http://’ will be added automatically, so if you want to exclude Yahoo, just type yahoo.com. Please note you need to differentiate between ‘http://’ and ‘https://’
Added websites/URLs will now be excluded from any Avast scanning

Adding Website/Domain/URL Exception into Avast 2019

On the screenshot above you can see that URLs ‘https://www.gmail.com‘ and ‘http(s)://.gmail.com‘ are excluded. Such exception also applies to all pages on these domains as we have used ‘/*’ in the path.

Avast For Mac Firefox Shield

Add Exception for Specific Avast Antivirus Shield (File System Shield, Mail Shield, or Web Shield)

If you want to add the exception for the specific Avast shield, follow the steps further.

Open the Avast user interface and go to ‘Settings‘ » ‘Active Protection‘
Select the shield (File System, Mail, or Web) for which you want to add the exception, and click on ‘Customize’ link
Find the menu item ‘Exclusions‘ and add the item you want to exclude from scanning by the specific Avast shield. You can also specify when the exclusion applies (for reading, writing, or executing)
Please note that global exclusions are always applied although they aren’t listed in the specific shield. Also please note a lot of items are listed there by default

Adding Specific Shield (File System, Mail, or Web) Exception into Avast 2019

Download hp deskjet f380 driver for windows 7 64 bit. On the screenshot above, you can see many items are excluded from the File System Shield scan by default. We haven’t added any of them. Download game 8 ball pool free.

[IMPORTANT] Restart All Avast Shields to Make Exclusion Work

After you successfully add the file or webpage to exclusions you need to actually resta

Avast For Mac Firefox Webseild