It doesn't matter if I use chrome or firefox, I can not open pages like analytics.google.com or mailtrack.io. On both browsers the same. I can see that browsers shows me a blank page with no eource code on it. I can also see that it says "connection is not secure" when I click on icon nexto to URL editbox in browser. When I open these websites on TOR Browser everything looks fine. How to fix this? I can't understand where the problem is. It just stopped working one day and tht's it.
So I have found the problem... I used internet tethered by my smartphone, on which was AdAway installed. The host.txt included mailtrack.io, so I added it to whitelist and now everything is fine!