Keychain is password/ Card management app for all Mac OS X users, who can easily save/ Update or Delete login credential on Safari without accessible from third-party extensions or Websites. Alternatively, all web browsers (Safari, Chrome, Opera and etc) allow for save login and password within browser. That can be stealing by hackers in most cases, be aware. So, Save webpage login credential on Mac using Apple keychain app, later on use to and easy sync on cross platform (iOS) and devices (iPhone/ iPad).
Keychain also use to for save login details forcefully after command never save details from this webpage to browser. Convincingly, keychain evaluation is surprising for all apple lovers.
Setup or Save webpage login credential on Mac Using Keychain
Here, in test example I added facebook page URL and Username, Password in keychain app. See screen whenever I access this page will receive verification popup. In the case if I want to go with another login then click on Deny and Enter updated login credential.
Note: There are many third-party apps for manage all passwords on Mac under one roof, 1Password, Bluenote 1.25, Keeper, OneSafe 1.0.3, PassLocker and Passwarden.
Any queries and want help on keychain save webpage login credential on Mac OS X IE Capitan, OS X Yosemite.