Comment 16 for bug 91584

Robert, see http://archive.mozilla.org/pub/firefox/nightly/ -- it might take a bit to load the first time, sadly. :(

The directories you're looking for have names like "2006-09-15-04-mozilla1.8/" -- that would be a build from the 1.8 Gecko branch (which Firefox 2 is based on), compiled on September 15, 2006, at 4am Pacific time. There will generally be 2-3 directories like that per day (Linux, Windows, Mac builds). These aren't releases, but development snapshots, but they should be pretty stable in general.

The earliest 1.8 branch build (pretty identical to Firefox 1.5) looks like 2005-08-09-12-mozilla1.8/ and the most recent one on archive right now is 2006-10-16-05-mozilla1.8/ -- more recent builds would be at <ftp://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/>.

I've had good luck in the past with a binary search on the builds in cases like this. For about a year's worth of builds, as in this case, only about 8-9 need to be tested...