hello, when you've downloaded firefox 30 a few weeks ago you have switched to the beta channel - you'll continue to get beta updates once you install a beta version. to work around that install the regular release version again: getfirefox.com

Thanks. Since installing 30 solved a problem I was having, can I just wait until 30 becomes the official release and then install it on top of my current installation of 30 to get off the beta channel? I have a feeling the answer is "yes" based on your description of what's going on, but thought it best to ask.

Once you install a Beta version of Firefox, you stay on the Beta update channel; it will never change to the Release channel.

Firefox 30 was released this past Tuesday, June the 10th.

Can never get off of it?? That's strange... Where/how is the information stored that tells Mozilla "beta for life?"

I found my solution for getting off the beta channel here, in part of the post by ideato at https://support.mozilla.org/en-US/questions/940799

   Close Firefox.
   Go to C:\Program Files\Mozilla Firefox\defaults\pref
   Edit channel-prefs.js with Notepad pref("app.update.channel", "release");
   save it, exit, open firefox. 

check the change of app.update.channel in about:config

I saved the revised "channel-prefs.js" to a different folder (since it wouldn't let me overwrite the old file immediately), and then copied the revised version back to the original folder, saying to overwrite the existing channel-prefs.js (THAT it would allow).

It worked. Now when I do Help/About Firefox it tells me I am up to date with 30.0, instead of asking me to upgrade to the latest beta. I assume that means the beta nags will stop. If not, I'll re-post here.