There's an extension for Mozilla Firefox called 'Gmail Notifier' and the guide for it says 'quote': "This extension is probably against your Gmail agreement, and I won't be held responsible for anyone losing his/her account or becoming the top result for "agreement breaking *****" on Google."

Is it worth installing?

You can read about it at http://nexgenmedia.net/extensions/

These people seem to like it https://addons.mozilla.org/extension...ments&pageid=2

Yeah, but I just want to know if it really is against the Google Agreement, and if so, is it worth installing anyway?

hmm..your call. Why not email Google and get a definitive answer - they're quite friendly

Good idea. Thanks. :-)