David Tenser wrote on Firefox Support Blog: "With Firefox 3 Beta 5 just released, a lot of people have probably noticed that we're no longer using the built-in product help, but instead linking to help content on the web. I'd like to take the opportunity to clarify why we did that in case there are people who weren't aware of the decision, or forgot why it was made in the first place.

"First, though, a clarification: what you're seeing today in Firefox 3 when selecting Help from the menu is just a temporary, static page that acts as a placeholder for the real help content hosted on SUMO. We're still working on the performance issues that hit us last week, but should soon be able to link to the actual documentation again. We're also still working on finalizing the English help content so localizers can start translating it. More on that later."