This page allows you to do a quick check whether your browser supports the features that OctoPrint uses.
Feature Required since Supported?
arrow functions 1.9.0
async/await 1.9.0
async generators 1.9.0
generators 1.9.0
let 1.9.0
spread syntax 1.9.0
template literals 1.9.0
If any of the tests above say "No", you will need to use a different browser or update your current browser to a newer version before you can use OctoPrint.