// create a manifest.json file in the root directory
{ "manifest_version": 3, "name": "Hello Extensions", "description": "Base Level Extension", "version": "1.0", "action": { "default_popup": "hello.html", "default_icon": "hello_extensions.png" } }
{ ... "content_scripts": [ { "js": ["scripts/content.js"], "matches": [ "https://developer.chrome.com/docs/extensions/", "https://developer.chrome.com/docs/webstore/" ] } ] }
matches ==> https://developer.chrome.com/docs/extensions/mv3/match_patterns/ <all_urls>
*/