I have Foxfire and every time I open a browser, one pops up.

Is it supposed to do that? If not, how can I stop it?

Here is a screen print of what pops up:

That's the Options window from the Weather Watcher Live Firefox extension. It'll continue to open until you set the active weather station via the "Add Station..." button. If you don't want to use the extension, then uninstall it from "Tools" --> "Add-ons" in the top menu within Firefox.

That worked. I thought I had already put the station but it was not there. It is now
and no more pop ups.

Thank you so very much for your help.