URL: https://youtube.com

Browser / Version: Firefox 104.0
Operating System: Mac OS X 10.15
Tested Another Browser: Yes Safari

Problem type: Design is broken
Description: Images not loaded
Steps to Reproduce:
All youtube pages show grey boxes instead of thumbnails for individual videos. "Mix" playlists do show thumbnails. Numerous console messages, errors, and warnings, including:

• "LegacyDataMixin will be applied to all legacy elements.
  Set _legacyUndefinedCheck: true on element class to enable."
• "Some cookies are misusing the recommended “SameSite“ attribute "
• "Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://googleads.g.doubleclick.net/pagead/id. (Reason: CORS request did not succeed). Status code: (null)."
• "Will-change memory consumption is too high. Budget limit is the document surface area multiplied by 3 (711810 px). Occurrences of will-change over the budget will be ignored."
• "Source map error: Error: request failed with status 404
  Resource URL: https://www.youtube.com/?themeRefresh=1
  Source Map URL: global_styles_sass.css.map" and same with source maps kevlar_global_styles_sass.css.map, yt-swatch-behavior_custom_style.css.map
• "MouseEvent.mozPressure is deprecated. Use PointerEvent.pressure instead."
• "The resource at “https://i.ytimg.com/generate_204” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. www.youtube.com"
• "Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://play.google.com/log?format=json&hasfast=true&authuser=0. (Reason: CORS request did not succeed). Status code: (null)." <- this one appears to load on status check, possibly?

Things I did to fix this that did not make any difference:

• restarted firefox with all prev tabs open
• restarted my entire computer
• blew away youtube cookies and hard reloaded
• blew away a lot of other cookies and hard reloaded
• loaded youtube in incognito window
• disabled all my extensions one at a time and hard reloaded

Things that worked, but at what cost: Safari

Things I have changed or updated within the last few days: - updated Firefox to version 104.0.2 (64-bit)

• no installing or enabling anything else new that I recall

Thank you!

View the screenshot

From webcompat.com with ❤️