Firefox, Chrome - can't start https google services

I’m using MIKROTIK as proxy, but using Firefox or Chrome I have following problems:

    • google can’t show pictures found
  • gmail stucks on progress bar before mailbox is loaded
  • youtube can’t show any video
  • google maps are not working at all (blank screen)
  • even google translator doesn’t work

But, everythyng is OK, when:

    • I’m using IE (proxy or direct)
  • I’m using MFF or Chrome but direct connection (without proxy)

So it seems to be a situation with HTTPS protocol in MFF or Chrome.
Where shall I start?

  1. See which firewall rules are being hit.
  2. Look at a packet trace
  3. Remember that you can only proxy HTTP, not HTTPS.

Thanks for the answer.

  1. It doesn’t work even if I disable all the firwall rules
  2. What does it mean? That it’s normal, that secure google services doesn’t work behind mikrotik proxy? Why it works using IE and not the other browsers? :frowning:

Example of google search:
Picture5.jpg