My Faith in Firefox is Waning

I once extolled the virtues of Firefox, especially its knack for warding off pop-up advertisements. Unfortunately, I am now getting almost as many unsolicited ads on Firefox as I do on Internet Explorer. My power-to-the-people ethic tells me to stick with Mozilla's browser and not to return to Microsoft, but I hope that the open-source programmers out there can make the necessary adjustments to Firefox.