For those still looking for a solution in Firefox Quantum where these addons no longer work, I have created a simple application called FF Password Exporter for exporting your passwords from Firefox 58+ to a portable CSV or JSON format. It works on Windows, macOS, and Linux. Mar 21, 2017 · And now its Firefox add-on. It has been a busy weekend for LastPass software engineers. Late last week, Ormandy found another LastPass vulnerability, this time in its Firefox extension. Again, the vulnerability can be exploited by malicious webpages to extract passwords from the manager. Wrote a quick exploit for another LastPass vulnerability.
Firefox now warns when password reuse is particularly dangerous. With Firefox 76, Mozilla's browser tells you when you're reusing passwords that could have already been compromised.