[Aachen]

Perhaps, but it loaded fine in Chrome as well as a logged-in tab. It only rejected the Firefox no-cookies user agent. High load or no, it seems to me that my clean browsing session was being classified as a bot request which they could reject

Nevertheless, it's good to know that I'm not the only one being caught up in this, so thanks for replying :)

[esperent]

No worries. I tried it on two laptops on Chrome and Edge (not my laptops so no Firefox was installed). Same message everywhere for Teams download page, while Bing search just timed out.