Just something to be aware of as it may have an affect on visiting any website for any reason, it's not just PayPal. There's lots of info on the net concerning this topic - for example, just search on: TLS 1.0 to TLS 1.1
Many web based services including PayPal are or have been updating their site security Transport Layer Security – or TLS – from TLS 1.0 to TLS 1.1. The Transport Layer Security (TLS) is a cryptographic protocol used to establish a secure communications channel between two systems. It is used to authenticate one or both systems, and protect the confidentiality and integrity of information that passes between systems including things as email, Internet faxing, and other data transfers. To ensure the security of your personal information, your web browser also needs to be compatible with the new protocol. Browsers that don’t support TLS v1.1 or v1.2 will not be able to view any site that has upgraded to TLS 1.1.
The following browsers support the security changes and no action is required on your part:
Internet Explorer 11 (Desktop & Mobile)
Internet Explorer 8,9,10 (Desktop – Compatible but not enabled by default)
Firefox 27 and higher
Google Chrome 38 and higher
Google Android 5.0 and higher
Safari 7 on OSX 10.9 (Mavericks) Desktop and higher
Safari 5 on iOS 5 Mobile and higher
Edge
The following operating systems are not compatible with TLS 1.1 or higher and it's recommended that you upgrade your operating system to a supported system:
Windows XP
Windows Vista
Server 2008
Server 2003
Notes:
* If you're currently using Internet Explorer 7 or earlier – You must upgrade your browser
* If you're currently using Google Chrome – You must have have Windows 7 or a newer operating system
* If you're currently using Firefox version 26 or earlier – You must have Windows XP Service Pack 2 or newer
* If you're currently using Safari – versions older than 7 on OSX 1.9 (Mavericks) – TLS 1.1 and TLS 1.2 are not supported, so you must use Google Chrome for MAC
