What I've got so far...
So I think I've managed to get the right numbers, and the results are in the graphs below.
Edited: Current results are from the period of 9th October 2012 to 19th November 2012 PST (previously UTC).
The first graph shows the bugs that were added to and removed from tracking-firefox17+ in the 6 week period (click 'show all' to show results for the whole of 6 weeks)
The second graph shows the daily drop in open bugs in tracking-firefox17+. I minused off bugs that were RESOLVED/VERIFIED/fixed(status-firefox17)/wontfix and added them back if they were REOPENED. Notice how the number of open bugs still do not go down to zero at the end of the period. Although some were closed on 2012-11-19 (PST), they might have been recorded as RESOLVED on the following day (GMT) an example. Either way, the final number of open bugs would not have reached 0 because some of the bugs are still recorded as NEW (another example).
Authors and Contributors
@bztools to access Bugzilla's REST API
@amcharts for visualisation