<strong>Has the add-on been well-tested, and is it free of obvious or serious defects?</strong> One important thing that we look for when considering an add-on is whether its user reviews indicate that it has received thorough testing, and that it doesn't have serious problems or negative impacts on the browser. If reviewers report problems such as major performance issues, crashes, frequent problems using the functions of the add-on, or spamming of messages to the error console, you should take those reports to heart, and re-submit your add-on after you've addressed them as best you can. We don't expect you to perfectly optimize or have zero bugs &mdash; Firefox itself undergoes constant improvement in these areas &mdash; but we do want you to take reasonable efforts to minimize downsides, and to clearly call out cases where users may be surprised by those that remain.
<strong>Has the add-on been well-tested, and is it free of obvious or serious defects?</strong> One important thing that we look for when considering an add-on is whether its user reviews indicate that it has received thorough testing, and that it doesn't have serious problems or negative impacts on the browser. If reviewers report problems such as major performance issues, crashes, frequent problems using the functions of the add-on, or spamming of messages to the error console, you should take those reports to heart, and re-submit your add-on after you've addressed them as best you can. We don't expect you to perfectly optimise or have zero bugs &mdash; Firefox itself undergoes constant improvement in these areas &mdash; but we do want you to take reasonable efforts to minimise downsides, and to clearly call out cases where users may be surprised by those that remain.