Web Development Term Definitions
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Favicon
The small icon that appears in your browser tab next to a website’s name.
FID (First Input Delay)
Measures how quickly a website responds when you first click or tap something.
Firewall
A security system that blocks dangerous internet traffic from reaching your website.
Framework
A pre‑built structure or toolkit developers use to build websites more efficiently.
Front End
The part of a website you see and interact with (the visual design and buttons).
Frontend Development
Building the parts of a website users see and interact with — layouts, buttons, animations, and styling.