With regards to Browser version support, Pega typically supports are all versions. If you are experiencing an issue post-Google chrome update and the same works fine on other browsers(including previous Chrome versions) bring it to our notice, we shall take look.
Pega Platform is certified on the latest version of these supported browsers at the time a given version of Pega Platform is released. Reasonable efforts are made to test previous versions of the browsers. If you have an issue with Pega Platform guardrail-compliant UI in a particular version of a supported browser type, contact Pega Support, and we will make commercially-reasonable efforts to resolve the issue