[callahad]

> Am I interpreting this correctly?

Not quite. In the normal case, users will never see any difference as a result of this change. Most users will experience it, semantically, as "profile per channel," separating normal Firefox from Firefox Nightly, etc. And if you only use stable Firefox, you only have one profile.

That means that upgrading from Firefox n to Firefox n+1 is totally fine and it will continue to use the same profile. But installing Beta or Nightly will now default to using a separate profile, instead of trying to use the same local data as normal Firefox.

I suspect Steve's issue is because he's unpacking his new version of Firefox to a different location on disk, so we're treating it like a separate install, rather than an upgrade of an already installed Firefox.

[groovybits]

Ah I see now. When you said

> Sharing a profile between different versions of Firefox [...]

I was thinking different version numbers of the same Firefox installation (stable channel).

Profile-per-channel makes it much more clear, and makes sense.