Avast IS-Passwords extension for Firefox repeatedly 'de-Activates'

[REDACTED]

Avast IS-Passwords extension for Firefox has repeatedly 'de-Activated'. This is the third time this year, but this time I cannot get it to 're-activate'.  The Chrome extension is still active.  I have dis/enabled it, removed, re-downloaded & installed it, but it still shows only a grey icon which indicates "Avast Passwords is not activated.  Please activate it first."
Re-inserting the lic & activation code seems to have no effect.
Win10Pro, w/current firefox. 

[Asyn]

Repair Avast:
1. Control Panel -> Add/Remove programs -> Avast
2. Click on 'Repair'.
3. Follow instructions.
4. Reboot.

[Tomáš Hellebrand]

Hi jb0.

Go to Settings -> Passwords. There is a section named "Browser integration". Find a Firefox there and click on "Install".

Let me know if that helped. Thanks.

[REDACTED]

Thanks guys, although 'Settings> Passwords:Integration: Chrome & Firefox : (is already) installed, [Install] -> https://ipm-provider.ff.avast.com/?data= : (website confirms)  "Installed"
I have previously Firefox> Settings> Addons> Extensions> Passwords> disable & Remove & re-install, to no effect, even after reboot.
But when I opened Firefox today, Passwords is active !?!!