As I originally erroneously filed at [`mozilla/addons/issues/16310`](https://github.com/mozilla/addons/issues/16310#issue-4796632798): > At `2026-07-02T17:01:18+00:00`, I attempted to `assign` to [`https://addons.thunderbird.net/thunderbird/downloads/latest/quick-folder-key-navigation/addon-787632-latest.xpi?src=dp-btn-primary`](https://addons.thunderbird.net/thunderbird/downloads/latest/quick-folder-key-navigation/addon-787632-latest.xpi?src=dp-btn-primary) via [`addons.thunderbird.net/en-GB/thunderbird/addon/quick-folder-key-navigation`](https://addons.thunderbird.net/en-GB/thunderbird/addon/quick-folder-key-navigation/#:~:text=pane%20has%20focus%2E-,Download%20Now,-Works%20with%20Thunderbird), whereupon I observed an HTTP 502 (Bad gateway), with a CloudFlare ray identifier `a14f362c4d0a8ae0`.
As I originally erroneously filed at
mozilla/addons/issues/16310: