
You gotta be shittin' me!?
This doesn't support the theory that people avoided FF 3.x, for any reason: http://www.w3schools.com/browsers/browsers_firefox.asp. Nor does this: http://www.w3counter.com/globalstats.php. Nor do any other stats I can find.
If location bar privacy was *a* concern (or even *the* concern) of 25% of survey respondents, either they got over it or the survey sampling was poor. I myself would have listed it as an annoyance if I'd been asked about FF 3.0 on release. But the reason I held off upgrading was add-on incompatibilities. When those were resolved, like 'most everyone else on the planet, I upgraded.