https://www.boost.org/libraries/1.88.0/list/
In Firefox 138.0.4, when I Ctrl+Left Click on a library name or the docs icon in the list, the clicked link opens in the new background tab (which is normal), but the current tab opens the clicked library's readme page (which is not normal). Ctrl+Left Click is the standard hotkey to open links in new background tabs. It should not affect the current tab in any way (and I didn't even know it could).
This issue seems to only affect the library list; other links seem to open in the background without affecting the current tab, as they should.