Since I updated my 64bit FireFox to the current version 55.0.3 it is blocking almost any site I try to visit using secure HTTPS. In addition, I'm running AVAST Internet Security. I disabled AVAST' s HTTPS-Scanning (an option of AVAST' s Web-Protection component) but without success. The FoxFire error disappeared not until I shut down the Adguard service and unloaded the Adguard executable completely! I added some online Adguard filters in the past without having problems at all. Must I check all of them now, or is this a known issue with Adguard's basic implementation when running FF 55.0.3 64bit? Any hints/help appreciated!