LastPass is one of the best credential managers, but currently incompatible with the 'Ublock Origin' and 'Decentraleyes' addons. LastPass will deny your signin attempt with these add-ons enabled. LastPass essentially becomes unusable even with the "Lastpass.com" domains whitelisted under on the Ublock and Decentraleyes settings. There is currently no fix for this bug other than disabling Ublock and Decentraleyes which is concerning to me, and can be considered a security risk for others.