I just switched web hosts yesterday, and immediately after the switch I noticed that my google ads aren't being displayed. I just assumed that maybe they have to recrawl the site and didn't think much about it. But later on I noticed that ads are displayed in IE perfectly fine. Now it's the next day and ads are still displayed in IE, but Firefox is just blank. I could always see them in FF before the switch, so that's why my initial assumption was that it's related to changing hosts. But if that's the case, why are they served to one browser and not the other? Is this something I should be concerned about, or should I just give it time?
I am not using any such plug in. Nothing is any different on my browser than what it was before the transfer. Even just minutes before the transfer I was seeing them just fine, but as of right now I'm still not seeing anything, but IE shows them just fine. I'll wait until tomorrow and see what's up. If it's not showing I'll try to reinstall firefox and see if that does the trick. But nothing has changed on my browser, so if I was seeing them before I should be able to see them now, or so I thought.
If you just made the server switch yesterday, give it another day. When I switched my hosting IP, my site only showed public ads for a day.