The new add-on site will sport enhanced user-to-user discussion tools and will be available in multiple languages, a . Most important, however, is that the site will cull the number of supported browser extensions from more than 2,000 to a couple of hundred.

Its debut was delayed by technical problems. A notice posted Wednesday to the explained. "We've hit some unforeseen problems...without getting into the details, we're having some issues with the way our infrastructure is caching (or not caching) the new pages. Rather than risk a slow, (and thus, frustrating) user experience at launch, we've decided to iron out the problems with the servers before deployment."

Also Wednesday, Mozilla engineer Justin Fitzhugh said that site downtime scheduled for Thursday tonight would be used to update the add-on section. "We ran into some unexpected code and infrastructure issues with the last release, which have been resolved," Fitzhugh said.

The update is to begin at 10 p.m. EST.

Some Firefox users have already begun worrying about which extensions Mozilla will drop from its public site. In a response, Mozilla's Wil Clouser wrote "We're not deleting any extensions, we're dividing them into a public area and a sandbox area."