As of April 11, 2017, Windows Vista customers are no longer receiving new security updates, non-security hotfixes, free or paid assisted support options, or online technical content updates from Microsoft. Microsoft has provided support for Windows Vista for the past 10 years
https://support.microsoft.com/en-us/help/22882/windows-vista-end-of-support
The most recent version of Internet Explorer in Windows Vista was IE 9.0.8112.16421 (9.0.57)
Even Apple, Google and Mozilla Firefox have ceased to maintain browsers for this operating system, dropping support for Windows XP and Vista at the same time.
Chrome 49.0.2623.112
https://chrome.googleblog.com/2015/11/updates-to-chrome-platform-support.html
Firefox 52.9.0 ESR
https://support.mozilla.org/en-US/kb/end-support-windows-xp-and-vista
Safari 5.1.7
https://apple.stackexchange.com/questions/68836/where-can-i-download-safari-for-windows