password manager installed but can not access menu


I install the password manager extension for Firefox, and then sign in, but from there the I can't see how I can see that passwords have been added when I log on to a site bt if I try to acces the Locker or men it just sends me to installation again in a loop

When I login to a site, it asks if I want to save the password so know it's working in that sense.

I am running laptop on Windows 10.