Author Topic: Avast blocks Firefox traffic when HTTPS scanning is enabled  (Read 1147 times)

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Offline hiacinth

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Avast blocks Firefox traffic when HTTPS scanning is enabled
« on: September 28, 2018, 09:39:15 PM »
Hello,

When I use Web SHield -> HTTPS Scaning on Avast Premier and open anything in Firefox 63b9 I get an error: SEC_ERROR_UNKNOWN_ISSUER

HTTP Strict Transport Security: false
HTTP Public Key Pinning: false

This does not happen to Google Chrome however I prefer to use Firefox.

It happens since today (28.09.2018), and it did not happen before. Disabling HTTPS Scanning does the trick but shuts down a layer of protection as well. Any other solutions for this?

Offline Asyn

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Re: Avast blocks Firefox traffic when HTTPS scanning is enabled
« Reply #1 on: September 29, 2018, 05:12:34 AM »
Repair Avast:
1. Control Panel -> Add/Remove programs -> Avast
2. Click on 'Repair'.
3. Follow instructions.
4. Reboot.
Win 8.1 [x64] - Avast PremSec 21.10.6772.IBC [UI.679] - EEK - Firefox ESR 91.3 [NS/uBO/PB] - TB 91.3.2
Avast-Tools: Secure Browser 96.0 - Cleanup 21.3 - SecureLine 5.14 - Driver Updater 21.3 - CCleaner 5.87
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline hiacinth

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Re: Avast blocks Firefox traffic when HTTPS scanning is enabled
« Reply #2 on: September 29, 2018, 08:28:04 AM »
It did work! Thanky You!

Offline Asyn

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Re: Avast blocks Firefox traffic when HTTPS scanning is enabled
« Reply #3 on: September 29, 2018, 08:47:28 AM »
You're welcome.
Win 8.1 [x64] - Avast PremSec 21.10.6772.IBC [UI.679] - EEK - Firefox ESR 91.3 [NS/uBO/PB] - TB 91.3.2
Avast-Tools: Secure Browser 96.0 - Cleanup 21.3 - SecureLine 5.14 - Driver Updater 21.3 - CCleaner 5.87
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0