Today i've upgraded Mozilla Firefox Quantum from v67.0.2(64-bit) to v67.0.3(64-bit).
Also, i have installed Kaspersky Password Manager Add-on for Firefox v4.1.15, updated may 14, 2019.
But, i think that the latest version of Firefox and the Add-on are incompatible.
On some websites the "key" icon is GREY, while on other sites the "key" icon is just missing.
This never happened with Firefox v67.0.1 and 67.0.2, i never had any problems on those sites.
I posted 2 photos to see the issue.
//Mod Note: moved to proper section.
Best answer by Flood and Flood's wifeView original