“But what you don’t realise is that when it requests certain http…
“But what you don’t realise is that when it requests certain https URLs, it requests them TWICE. Once to pass the data across. No problem, and a second time to display it, to you, the user, in your firebug console.”
I had this problem too; and if you were POSTing data it didn’t get sent, just the GET part of the request was resent, so you couldn’t even see the original results! The old (1.0) version didn’t do this, and I believe the most recent versions of 2.0 don’t do it.
The extension has been very unstable since the 2.0 branch started, but unfortunately 1.0 doesn’t work with Firefox 3. Looks like 2.0 is finally getting stable the last couple of weeks.