Review for Password Exporter by Wile E. Coyote
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!
To create your own collections, you must have a Mozilla Add-ons account.