Remove references to no longer supported Mozilla Firefox

Change-Id: Ifa9a393c7c268142f583dd20787c61ac04e8fbb1
Update sorting and add comment for recently added repo

Change-Id: I26c2d708ab201732d88455a95bc73d159857315f
Merge "Remove references to no longer supported Mozilla Firefox"
Merge "Update sorting and add comment for recently added repo"