On a PC | https://community.canvaslms.com/t5/Canvas-Basics-Guide/How-do-I-clear-my-browser-cache-on-a-PC/ta-p/48
On a MAC | https://community.canvaslms.com/t5/Canvas-Basics-Guide/How-do-I-clear-my-browser-cache-on-a-Mac/ta-p/43