I have Win 10 upgraded on top of Win 7, running Sea Monkey browser - variant of Mozilla

In your browser, try using "Stealth", "Incognito", or "Private Browsing Window", etc. If you aren't having freezes with that enabled, it's possible it's cookie related.

I noticed in my case s.yimg.com was showing up in freezes. I had blocked nearly every cookie in my machine. I deleted s.yimg and let it reload itself, and freezes are now a rarity. I suspect in my case freezes were caused by a particularly aggressive cookie policy and certain sites stalled because the cookie was disabled.

My suggestion is to experiment with your blocked cookies.

Given the millions of threads on this subject, I though I'd throw in one more that worked for me.