Contents appears and disappears for me too when visiting the houzz domain. (Works okay using Chromium but not Firefox)

Starting Firefox with extensions disabled does not help.

Firefox is up to date...

All is well when visiting using the gardenweb domain. (Which is what I normally use)

.

For example, visiting these links with Firefox, the page loads normally (and remains visible):

https://www.gardenweb.com/discussions/5489951/houzz-glitches#n=3

https://www.gardenweb.com/discussions/5492249/houzz-glitches-postupdate#n=0

.

Visiting these links using Firefox, the page loads, then vanishes:

https://www.houzz.com/discussions/houzz-glitches-dsvw-vd~5489951?n=3

https://www.houzz.com/discussions/houzz-glitches-postupdate-dsvw-vd~5492249?n=5

I’m getting error messages in Russian. (Chrome, Safari mobile) Think Houzz has been hacked?

Then there is the double vision bit. The posts have been in an infinite scroll loop for a while that just starts the posts over again at some random point in s big loop. Then it progressed to doing that same infinite loop inside a post. Now it’s doing it one on top of another Inside a post, instead of a loop.

Did you get to that page using a shortcut or through a web search?

I ask because it looks like you've inadvertently visited the Russian site.

You might try houzz.com instead.

Finally...pages!! But...

Are we having fun, yet? :-/