It's 2022 and web browsers are still unable to unfollow redirects.

If I open some URL in a new tab and it redirects me to /503.html or similar due to some server errors (which is bad design to begin with), there is no way to see which URL was redirected from. The "back" (←) navigation button is greyed out, so there is nowhere to go back to.

One might open a new tab to look at it later without realizing it redirected to an error page. Then one opens it, sees /503.html, and has forgotten which article one was going to read.

Only on the mobile edition of Chrome/Chromium, switching between desktop and mobile view unfollows the redirect. But on Firefox mobile, Chrome/Chromium-based desktop, and Firefox desktop, there is no way to know which URL redirected me there.