FireFox crash on some Web sites

I have been seeing for some time now that certain Web sites crash FF This is one

Can any confirm same problem with above address?

FF ver 52.5.3

Note problem does not appear in Windows versions

All working fine here… maybe a plugin or extension?

Tweaked anything in about:config, I do, like peer media (webrtc), disable pocket, disable ipv6 etc. I run ublock origin

Can you create a new profile using firefox -p and see if it still crashes?

All ok with Leap 42.3, Plasma 5.8.7, FF ESR 52.5.3 (64).

Ok must be something in the config. Thanks

Turns out it was the background theme. Changed to newer theme and all is back, though I still like the older dark theme better then any I’ve found yet