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Sorry for inappropriate username, too many problems with IT this morning.
How to install password protection for the browser, I have Edge
If you do mean F-Secure ID Protection (acts as Password Manager and Identity Security monitor or sort of) with autofill functionality (so, browser extension for that). And it is Windows platform, then installation guide is next:
To install browser extension: Installing and authorizing the autofill browser extension | ID PROTECTION | Latest | F-Secure User Guides
Text in English, but you can switch to any supported localization.
Also, some other useful KB articles: Latest Articles - F-Secure Community
If nothing is helpful, could you rephrase your need? So, I will think if something there to advice about.