Real software testing begins after acceptance testing is complete. In the software testing process, acceptance testing is just the tip of the iceberg.
There is a visible and an invisible component to a website. The tester should look at as much of the website’s invisible part as the visible part. Testers should search for unseen bugs to identify their impact on the visible part of the system. Google Dev Tools are the best friend of a tester.
Testers break software and developers build it. Nevertheless, testers break software in order to help developers protect them against future problems.