The extension displays this error (On Firefox, Chrome, Brave..):
Error! Error: No login found. www.mon-compte.bouyguestelecom.fr
Normal the URL is this: www.bouyguestelecom.fr/mon-compte

How can this error be corrected?

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"Use most simple form of the URL possible: bouyguestelecom.fr"

Even the simplest form doesn't work.

Plugin did not connect with firefox installed as flatpak. Took me a while ...

Not worked to me, not integrated with browser

Works great, improves security with better passwords and basic protection against phishing. One of the two addons I have installed.

The shortcuts could be advertised more prominently: Alt+Shift+U triggers auto-fill.