Add to Chrome.
Click 'Add extension' above.
The installation process should take less than a minute.
Next, you'll Create an Account.
The browser reports "SSL certificate is invalid" when installing LastPass.
The root certificate in the Mac OSX keychain is likely flagging LastPass as not trusted when the trust setting is set to "default". If you toggle it to "not trusted" and then back to "default", the root certificate will be flagged as trusted. You will then be able to complete the download.