What will Mozilla do about the Tor network's usability problems? Advanced users can workaround them and because they understand the benefits and engineering, accept the frustrations as a cost for a worthwhile (and free) technology. But what will non-technical users do?

Many public Internet websites filter connections from the Tor network, many other websites are very slow, yet others impose extra obstacles such as multiple rounds of captchas (even 5 or more) or degraded service (including high suspicion of payments), and of course you often will receive webpages in the wrong locale or language - which can trigger regional filters. Currently, workarounds requires resetting the circuit (few non-technical users will even understand what the circuit is), lots of patience and reloads, and often just giving up.

If that's the experience of typical Firefox users, they won't use it and they will have bad associations with Tor and Firefox.