I go to use my Google search bar and/or type what I'm wanting into the URL (either/or) and I get the following:
To continue, please type the characters below:
(CAPTCHA and box to type captcha in is put here)
About this page
Our systems have detected unusual traffic from your computer network. This page checks to see if it's really you sending the requests, and not a robot. Why did this happen?
IP address: xxx.xxx.xx.xxx Time: 2014-07-08T23:16:50Z URL: https://www.google.com/search?q=red+fox+sitting&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=fflb
I typed multiple CAPTCHAs in, too, and still nothing. I'm just wondering if others are experiencing the same. It's frustrating. I use FF. I don't think it matters, though.

No problem here. I just searched a couple of things and it just came right up. No captchas or anything else odd. I use FF too. Is there someone else on your wireless/network that could be doing something to cause it? Or maybe someone in your area? It could be police searching for a hacker or something...but I doubt it. Probably just some random check thing.