The number of add-ons per page is broken. Try the link, it shows nothing. You can also perform a search with more than 10 results (example: adblock) and click the 20 add-ons per page link.
11 years ago
Seems as there are many timeouts -> connection resets. Examples: - Dictionary page - Recommended extensions: https://preview.addons.mozilla.org/en-US/firefox/recommended - Links to pages with higher add-on number per page (search and listing) ...
This has been fixed in trunk (mainly: out of memory issues). When preview is updated, this should go away (on stage, it works, with the same dataset).