Userscripts in Chrome

Question

JavaScript

I'm trying to learn user scripting. I am writing the simplest script with an alert. Alert should take off only when we go to the google site. The code:

// ==UserScript==
// @name           GA
// @description    Google alert
// @include          http://www.google.com/*
// @include          http://google.com/*
// @include          https://www.google.com/*
// @include          http://www.google.com/*
// @include          http://www.google.ru/*
// @include          http://google.ru/*
// @include          https://www.google.ru/*
// @include          http://www.google.ru/*
// ==/UserScript==
alert ("Привет, мир!");

I save this to my.user.js file and then drag and drop this file into Chrome extensions. The script is installed. And this alert starts popping up on all the sites that I visit. What am I doing wrong?
And how to see changes in your script in real time? Those. I edited the script and it immediately began to work differently. And so now I have to edit the script, remove the old extension from the browser, reinstall my edited script, only then the changes are applied.

Answer 1

I could have forgotten something, but the user script must be installed via Greasemonkey, which just knows how to read these include . Otherwise, it reads like a regular script that starts executing right away.
You can also write www.google.tld/ * if you want to include all countries.