What is the use of the F12 key in Mozilla Firefox?

Question

I think it is used to check the encoding, but when I tried it, it did not respond. I mean that it does not give any answer and does not show the data of the current website.

Answer 1

F12 opens Firefox's built-in development tools in recent versions of Firefox. Press F12 again to close it. There is an extension to disable the shortcut: https://addons.mozilla.org/en-US/firefox/addon/disable-f12-shortcut/

Answer 2

F12 is a shortcut to open firebug in firefox. To open firebug you must first install it

Answer 3

F12 is not tied to anything in Firefox - see Hotkeys . You are probably thinking of adding Firebug , which opens with this key.

Access to the built-in Page Inspector in Firefox (v10 and beyond) is done with Ctrl + Shift + I , and then Alt + M.

Answer 4

F12 is a standard Firefox shortcut that turns Firefox Developer Tools on and off. When you press F12, the lower half of Firefox opens to show / show "Developer Tools", a web console (toolbar?), Which

1. Logs information related to a web page: network requests, JavaScript, CSS, security errors and warnings, as well as error messages, warnings, and informational messages registered using JavaScript code that runs on the page.
2. Allows you to interact with a web page by executing JavaScript expressions in the context of the page.

It also has an inspector, debugger, style editor, profiler, and more.

Again, F12 turns it on and off.

Go ≡> Web developer, and you will see a menu of all its functions and their shortcuts.

(Firebug was a free open source web extension for Firefox that made it easy to quickly debug, edit, and monitor any CSS, HTML, DOM, XHR, and JavaScript website. It was deprecated (replaced by something better) in favor of integrated developer tools (F12) added to Firefox itself. Since Firefox 57 no longer supports XUL add-ons, Firebug is no longer compatible.)