CS First works best in the newest and last prior version of these browsers:
- Google Chrome
- MS Edge
- Internet Explorer 11 (not supported starting Jan 2, 2019)
Without the most up-to-date version of your browser, you’ll still be able to use CS First, but you may have problems using newer features. Each time a new browser version is released, we begin supporting that version and stop supporting the third most recent version.
Check what browser version you're currently using at WhatBrowser.org.