Hi I notice that you are using an older version of Firefox, so I recommend you update to make sure you have the latest security and stability fixes. You can read more about how to update [https://support.mozilla.org/en-US/kb/update-firefox-latest-version here]. If you are using Firefox on a computer set up by your employer, you may need to speak to your IT support desk as installing software may be disabled in line with a company policy.