Lacks a master password Rated 5 out of 5 stars

I find this a great add-on for those who need to manage lots of web-based email accounts, even from the same webmail provider. However, it would be nicer if WMN would ask for a master password before it begins to check all emails right after you open the Firefox browser. That master password would then be active until the browser is closed.

This review is for a previous version of the add-on (2.9.13). 

Use firefox's master password.

Use firefox's master password. It exactly does what you said.