Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. The Firefox cache temporarily stores images, scripts, and other parts of websites while you are browsing.
Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies, do the following:

1. Tap the menu icon located at the top right corner. This is the icon with 3 bars. On older Android devices you'll have to press the hardware menu key and then tap More.
2. Tap Settings.
3. After that, you will be taken to the settings screen. In the settings screen, look under the section Privacy & Security and select Clear private data.
4. You will then be taken to a list of what can be cleared. Select the following 2 for deletion:
   • Cookies & active logins
   • Cache
5. After those have been selected, tap the Clear data button to actually clear the cache and cookies.

I did not find the icon referenced. However, I went into tool "privacy" and found the area to delete cookies & cache. Those were removed. Still could not set up sync account (Had the same problem of not be able to see privacy words--for proving I am not a robot.

Which method do you use?

Are you pairing a device with the 12-character code or are you entering the name and password and sync key manually (I don't have the device with me)?

Once I get an account set up I will be pairing with an android tablet with a 12 character code.