It allows FPlus to perform actions (like posting or joining groups) without being flagged as a "new login" every few minutes.
Click the (cookie icon) in your extension bar. Get Cookie For Fplus Chrome Extension
Logging in via cookies is generally safer than using a username and password for automation. It allows FPlus to perform actions (like posting
How to Get Cookies for the FPlus Chrome Extension: A Complete Guide Get Cookie For Fplus Chrome Extension
There are two main ways to get your cookies: using the official FPlus tool or using a generic cookie editor.