Will Password Manager Firefox extension work with multiple Firefox profiles?

[JamesEm]

Hello,

I use multiple Firefox profiles in Windows to separate my different browsing activities so they don't interfere and to reduce the chances of compromise. I've been doing this successfully for many years, before Multi-Account containers were implemented in Firefox. I use the Firefox Profile Manager to create multiple profiles, then add shortcuts to the Desktop. Having separate shortcuts allows me to set a custom icon to make clear the purpose of each shortcut and the Firefox profile it uses. The Target command used in each shortcut is in the form:

"C:\Program Files\Mozilla Firefox\firefox.exe" -P my-profile-name1 -no-remote

The "-no-remote" means that it starts a new instance or copy of Firefox, using the profile "my-profile-name1". It doesn't open a new tab in the existing default browser. If that profile is already open, the "-no-remote" means that it won't respond to any requests to open a new tab.

I maintain and use the default Firefox profile for everyday browsing. This means when I click a URL link, it will open in a new tab in my default browser instance. The default browser is also where I have the Kaspersky Password Manager (KPM) extension installed to populate login details from my password vault and to update or add entries.

My questions:

1. Can I install the KPM extension in multiple profiles?
2. Can I use the KPM extension in multiple profiles at the same time?
3. If using multiple profiles at the same time is not possible, can I use the KPM extension in one of the multiple profiles at a time?
4. If I can install the KPM extension in multiple profiles, is it possible to use the non-default profiles in a read-only way, to populate login fields but not to save new entries?

I'm guessing that KPM already allows multiple access to the password vault, from both the application and the syncing process, so multiple access may be possible. However if the extension isn't built to handle access from multiple instances of itself, then option 2 (above) won't be possible. I'm hoping that option 3 or 4 might be possible fall-back uses.

I'm not sure exactly how to go about testing these scenarios and what success or failure would look like. Obviously I need to use a backup of my vault in another user account, create some new Firefox profiles, find a way to install the KPM extension in each profile, try using each profile instance one at a time, then try using two profile instances at the same time, noting results/errors each time.

If anyone has any experience of using the KPM extension with multiple Firefox profiles, I'd be very interested to hear about your experiences.

Many thanks,
James

 

 

Windows 10 22H2 build 19045.7291 (extended support in place, latest updates installed)
Kaspersky Plus 21.25.7.504(a)
Kaspersky Password Manager 25.1.0.602 (a) / 1780062802_7816 / 1.1.0.2_1
Firefox 151.0.3 (64-bit)

Edited June 5 by JamesEm
Correct last sentence; add tags