Results don't show in Firefox 3.6 and earlier

Ran `npm start` on [this PR's branch](https://github.com/openwebdocs/mdn-bcd-collector/pull/2052).

Firefox 3.6:

<img width="552" alt="image" src="https://github.com/user-attachments/assets/4f6be7f2-3aa0-43cd-b205-bc7d18773e49" />

Firefox 4:

<img width="515" alt="image" src="https://github.com/user-attachments/assets/b0d9ec21-76f7-4ced-9b53-38c087d24419" />
