Rated 5 out of 5 stars
I used to LOVE this extension but it hasn't been updated since BEFORE FireFOX brought out their latest versions (FIREFOX QUANTUM, aka v59+).
If you are like me and can't use this extension (v59+, post 2018 versions of FireFox) - Get a program called PASSWORDFOX. It is available for Windows, in both 32 and 64 bit versions.
It will allow you to do the same things this EXTENSION would have!