Is the Dashlane extension not working or showing up in your browser toolbar? This might happen for several reasons. To solve the problem, use the troubleshooting tool in this article.
It's always a good idea to make sure you are using the latest version of Dashlane available.
If you're logged out of Dashlane each time you close your browser, you can stay logged in by selecting the "Keep me logged in for 14 days" option.