A December 2019 study by University of Plymouth Professor Steve Furnell assessed the effectiveness of 16 password meters that people are likely to encounter online. While most meters effectively steer users towards more secure passwords, some will over-rate even the most commonly used ones that are found on top 10 "worst-passwords" lists. One positive finding was that a browser-generated password was consistently rated strong. There was no mention of password managers and the strength of the passwords they generate. The paper is behind a pay-wall. An overview is given here: https://www.sciencedaily.com/releases/2019/12/191219090745.htm