manifest.json

{
    "manifest_version": 3,
    "version": "2.0",
    "author": "VEERT00X",
    "name": "Github Dev Plus", 
    "description": "Github Dev Button. A simple extension that adds a button to the toolbar that opens the Github Dev page in a new tab.",
    "homepage_url": "https://github.com/VEERT00X/Github-Dev-Button",

    "icons": {
        "16": "./images/icon.png",
        "48": "./images/icon.png",
        "128": "./images/icon.png"
    },


    "options_ui": {
        "page": "./html/options.html",
        "open_in_tab": true
    },

    "permissions": [
        "activeTab",
        "storage",
        "tabs"
    ],

    "content_scripts": [
        {
            "matches": ["https://github.com/*" , "https://github.dev/*"],
            "js": ["./javascript/github_com.js", "./javascript/github_dev.js" , "./javascript/options.js"],
            "css": ["./css/github_com.css"],
            "run_at": "document_start",
            "all_frames": false

        }
    ]
}