👁️ 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

На большинстве сайтов работает нормально, но иногда - никак.

ffをuninstal後再installしてempty cache button add-onを使用したらShow/hide passwordsが無くなり大変苦労。1Ｗ後に　show/hide passwordsを見つけて安堵しているところ。

Hhhh

Great addon that has a 'Show' next to the password where you can just click on it and it will be revealed

Truly a handy app for when you have a password stored on your browser but can't remember what it is.

It works some ! time. BUt there is some thing wrong in the script. There a lot of pages where it does not work. Example is https://www.kijiji.ca/t-settings.html -> password box.

Please reformat the revealed password into monospace font for readability.
A Chrome extension revealed the password on mouse hover. I'm not suggesting that is better but worth considering.
Great extension.

it is good, but not safe in browsing;
Save password in browsers not safe! (in case keylogger or spyware, if you absent hacker can leverage and read saved information

This works most of the times and when it does, it's very helpful. However, sometimes, even though the text Show is there in the red box, it will not reveal the password.