In my work I use 3-4 different accounts depending on the task that is needed.
E.g. my normal account for e-mails and normal activities
E.g. my admin account for administrative tasks
E.g. my cloud admin account for cloud administration
I would like to have different (set of) windows for different authentications. Distinct backgrounds and identification of the account would be great
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Similar ideas here:
shortcut for different profiles
The ability to open more than one Firefox profiles simultaneously
Firefox Profile Chooser Concept
By default, all profiles you connect to the same Firefox Account will use the same toolbar theme, which makes it difficult to tell them apart. To break sync'ing for themes, you can do this:
(A) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.
More info on about:config: Configuration Editor for Firefox. Please keep in mind that changes made through this back door aren't fully supported and aren't guaranteed to continue working in the future.
(B) In the search box in the page, type or paste services.sync.prefs.sync.extensions.activeThemeID and pause while the list is filtered
(C) Double-click the preference to switch the value from true to false