I just discovered that Nightly has HTTPS filtering disabled by default in Adguard settings, while in FF Beta was enabled. If you try to enable it appears a message saying that Nighlty won't trust user certificates. That is the reason for the different behaviour.
Firefox preview doesn't exist anymore. It's been automatically replaced by Firefox Nightly during one of the last updates. After installation, Firefox Nightly suggest to install Firefox Beta, and so I did (while uninstalling with normal procedure the Nightly).
Now I have both Nightly and Beta...
Firefox Preview was working fine, and also Firefox nightly, it's just the beta that doesn't work... Deactivating Adguard it's ok.
I just installed again FF Nightly and it works... I'll keep it, but Adguard should check the issue.
I 'm an AdGuard for Windows user.
I would like to know if it's safe with AdGuard to disable the Firefox built-in phishing and malware protection. Which filters should I activate to have a similar level of protection?
I already uninstalled uBlock Origin and Privacy Badger, and would like to...