Initiation

Check browser we support

By default, we support the latest versions of Chrome, Opera, Safari and Edge. But sometimes client demands the support of earlier versions

Check if there are separate files with adaptive design

If there are not additional requirements for adaptive design, check how the app will be zoomed on different displays.

Launch websites with http://localhost, not file:///c:\test.html

There can be problems with <iframe> and cross-origin requests when web-site is on file:// protocol

Don't stop because of working decisions

Don't only test that your solution is working but also check if it is readable and reliable. Readability must be your first priority