Minicart redirects user to home

[cmoorhouse]

1. Magento 2.1.5
2. php 7.0.17
3. Domain www.priceofbath.com
4. Browser not working correctly is firefox

Hi

The details are:

Steps to reproduce

1. Visit - https://www.priceofbath.com
2. Add a product to the basket/cart
3. The number of items now show in the minicart icon in the header
4. Selecting the minicart icon/number in a firefox browser redirects the customer to the homepage and not to checkout/cart

Expected result

1. Selecting the minicart icon/number in the header should show the contents of the minicart in the minicart view and allow the customer to then go to checkout

Actual result

1. Selecting the minicart icon/number in a firefox browser does not show the contents in the minicart view it instead redirects the customer to the homepage and not to checkout/cart
2. It works correctly in IE and chrome

I have tried swapping the theme back the default luma theme but the bug remains.
thank you.

[AbdulJaniBasha]

I guess you might have done this but one thing I can tell by my experience is
Clear pub/static(keep .htaccess)
Clear var/generation var/view_preprocessed, var/cache then deploy the static files again. And do the clear var/ genration ..... (all aboveagain ). Let's see if that works..