In this specific case I'd be willing to bet that Firefox 3 probably doesn't handle current HTTPS/TLS standards and might not be able to browser the modern Internet at all (let alone display modern webpages, HTML5 video players, single-page web apps, WebRTC live calls, etc.)
Put it behind privoxy. All those SPA blogs exist solely due to google. No google - no SPA.
- Why would Google (which famously didn't index Javascript well, and liked clear super-optimized URLs) have contributed to the existence of single-page applications (which used to have terrible drawbacks for SEO)? Where's the incentive?
- And what is a SPA blog? That seems like such a far-fetched idea.