Hey, @roniidavies!
Ryder here from the Social Care Team at Shopify. Welcome to the Shopify Community, and thanks for posting! We actually recommend users to utilize the most up to date version of Google Chrome for the best experience with the Shopify software; however, your customers should be able to visit your website with any supported browser.
I personally only use Google Chrome with my desktop and, similarly to @neeravmakwana, I had no problem with reaching the checkout up until the redirection to the payment gateway.
Are your customers experiencing issues after the redirection, or are they unable to arrive at the checkout at all? Have you been able to replicate this issue on your end? If you are indeed able to replicate this issue, please attempt to clear your cache before attempting again. Should the issue persist, please provide us with a screen-recording of what you're experiencing. Once we have more information, it'll be easier to narrow down what the issue might be.
If for any reason we need to have our Technical Support Team take a closer look, you may need to get in touch with a Support Advisor so that we can authenticate and access your account. Please note that if you're reaching out to us through our contact page, you will need to first login.
Hope this helps! If there's anything I can clarify on the steps above, please let me know.
Cheers.
Protip: Check out our Feedback On My Store section of our Community Forums for support with improving your shop's user experience.
