Mathematics

Hi I recommend that you update your copy of Firefox. The information that you have provided with your question suggests that you are using a very old unsupported copy.

The System Details show you are using a Firefox 46.0 version. *Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0 See also: *https://support.mozilla.org/en-US/kb/how-reset-default-user-agent-firefox *https://support.mozilla.org/en-US/kb/Finding+your+Firefox+version *https://support.mozilla.org/en-US/kb/update-firefox-latest-release *Help -> About Firefox