Chrome: go to View > Developer > JavaScript Console (here’s a guide) FireFox: go to Tools > Web Developer > Web Console (here’s a guide) IE11: go to Tools > Developer Tools > Console icon (here’s a guide) Safari: turn on the Develop menu: Preferences > Advanced > Show Develop menu in menu bar go to Develop > Show Web Inspector (here’s a … [Read more...] about How to Use Chrome Developer Tools