Jennifer Marsh writes on the Rollbar blog:

When you think of the top 100 sites in the world, you think of high-traffic domains and pages coded to perfection. In fact, even the most popular sites in the world have errors hidden behind the scenes that are still visible in your browser’s developer tools … We found that most of the top 100 sites had several errors which could be easily monitored and prevented.

In this post Jennifer shows you the most common errors faced by the top websites in the world and how you can avoid them.