I filtered the log in the screenshot for "giant" as you can see.
The log in the screenshot:
The loading of “https://www.giantbomb.com/videos/embed/16685/?autoplay=1&auto_play=true” in a frame is denied by “X-Frame-Options“ directive set to “SAMEORIGIN“. 16685
Now with a few less "umm"s... https://t.co/pFSfbaQyUq— Jason Oestreicher (@unastrike) March 26, 2021
Page firefox sends you to: https://support.mozilla.org/en-US/kb/xframe-neterror-page
This is an all new firefox profile, no addons.
Firefox 87.0 (64-bit)
Same thing happens in Microsoft Edge Version 89.0.774.63 (Official build) (64-bit) and Google Chrome Version 89.0.4389.90 (Official Build) (64-bit)