👁️ obsolete, the feature is already builtin without requirement for this addon:
https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Experimental_features#toggle_password_display

Does exactly what it says. I just wish the eye icon was closer to the input box to reduce mouse movement. But the add-ons that do put it in the password box don't work as reliably.

The best password field revealer: the icon in the url bar makes it perfect.

Does what says on the tin.
Perhaps should put a "LOOK AT THE ADDRESS BAR, DUMMY" sign when you first install it but other than that, great stuff, just what I needed after 'Show/Hide Passwords' stopped working with Quantum.

5 for working and simple solution, great work tnx