Numbering and Continuation of Footnotes
Answer
Keep in mind that Ibid., Idem., loc.cit. and op.cit. terminologies cannot refer to footnotes that were included to previous chapters (if you decide to use a per chapter numbering method). On the other hand, you could decide to use continuous numbering from the start to the end of your document (that’s what I usually do). The ultimate decision is yours; both methods are acceptable.